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Journal of the North Atlantic
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2018 Special Volume 7
146
Introduction
As noted in previously in this special volume,
the Icelandic Sagas recorded that the first
settlers came to Iceland after AD 874, that they
came from western Norway, and that they came
during the first 60 years and then stopped. As
Vésteinsson has reported (e.g., 1998; Vésteinsson
and Gestsdóttir (2016, this volume), several lines
of evidence dispute these facts. Reinterpretation
of these documents and source criticism brought
revisions to the rather specific time and the place
of origin of the settlers as stated in the Sagas
(Lárusson 1929, Vésteinsson 1998, Vésteinsson
and McGovern 2012). The dating of the landnam
tephra to the 870s AD reaffirmed that there were
no earlier traces of settlement on the island (Grönvold
et al. 1995, Zielinski et al. 1997). Recent
genetic studies of the origins of the Icelanders suggest
that substantial numbers of the early Icelanders
were born in parts of the northern British Isles.
These investigations have examined both modern
(Helgason et al. 2000, 2001) and ancient (Helgason
et al. 2009) DNA and arrived at similar conclusions.
The project reported in these pages is intended to
examine the questions of the arrival and homeland of
the first settlers of Iceland from another direction. We
measured strontium, oxygen, and carbon isotopes in
the teeth of archaeological burials from Iceland to
determine whether these individuals were local or
foreign born. In addition, carbon and nitrogen in bone
collagen were measured in the radiocarbon samples
that were obtained and are also reported in this article.
Iceland was settled in the late 9th and the 10th century
AD, with most of the settlers probably arriving
from Norway, the Scottish isles, and Ireland. The
earliest settlers were pagan, although there are
references to Christians among them. The written
sources suggest that the Pagan period covered
approximately the first 130 years of the settlement
of Iceland until AD 1000. The sources stated that
the Christianization of Iceland took place by public
consent at the Alþing around the year AD 1000
(Karlsson 2000:12–16, 33). Burial archaeology in
Iceland then tends to be split into two, probably
over-simplified, groups. These are the Pagan Viking
Age burials on the one hand (referred to as kuml in
Icelandic literature) and Christian cemeteries on the
other. The Viking Age burials date to the early period
of settlement in Iceland and are replaced by the first
Christian cemeteries following the conversion of the
Icelanders to Christianity.
We have analyzed virtually all the available
adult skeletal remains from this time interval
where enamel is preserved and report our results
here. The initial project involved the study of
the settlement of Iceland, and part of the data
has already been published (Gestsdóttir and
Price 2006). Further sampling was undertaken
from Icelandic archaeological skeletal material
following the promising results from the initial
analysis. In addition, we have obtained radiocarbon
dates on a number of the skeletons and also
report that information here in the context of the
timing of colonization. We report the latest results
of our investigations of the place of birth of settlers,
the period of colonization, and other aspects
of human movement to, on, and from Iceland. The
study concludes with a discussion of the nature of
Icelandic burial archaeology in light of the results
of the strontium isotope analysis.
1Laboratory for Archaeological Chemistry, University of Wisconsin-Madison. 2Institute of Archaeology, Bárugata 3, 101
Reykjavík, Iceland. *Corresponding author - tdprice@wisc.edu.
Viking Settlers of the North Atlantic: An Isotopic Approach
2018 Journal of the North Atlantic Special Volume 7:146–163
The Peopling of the North Atlantic: Isotopic Results from Iceland
T. Douglas Price1,* and Hildur Gestsdóttir2
Abstract - Iceland was colonized by settlers from the North Atlantic rim of Europe near the end of the first millennium
AD. This ws a remarkable achievement and the subject of much discussion. Historical documents, the Sagas, suggest that
the settlers came from western Norway and all arrived within a brief period after which no further settlement took place.
Genetic data, both modern and ancient, suggests that the settlers came from several places in Scandinavia and the northern
British Isles and Ireland. We have used isotopic proveniencing, focusing on strontium, oxygen, and carbon in tooth enamel
from early burials on Iceland to examine questions of place of origin. We have dated a number of these burials to discuss
questions of the timing and pace of arrivals. Carbon and nitrogen isotope ratios in bone collagen were measured along with
the radiocarbon date. Our data indicate that the settlers came from several different places, that settlement continued until
around AD 1000 and stopped around the time of the transition to Christianity. We can also suggest that there was movement
in both directions across the Atlantic. Changes in diet are suggested with greater consumption of marine foods over time.
Some differences in diet are also related to the location of settlement, whether coastal or inland.
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Early Burials on Iceland
The kuml burial grounds are, in all instances,
small sites. They tend to be a cluster of graves, with
the largest found to date containing 14 excavated
burials. They are always inhumations, frequently
aligned in a linear pattern, with the individuals
buried either in a supine or a fetal position. They
are often outlined with rows of stones, and were
probably never covered with more than a small
mound. The location of the plots seems quite
significant. They are usually found just outside
the home field of farms or on the junction of farm
boundaries and/or roads. Grave goods are common,
most often containing animal sacrifices (usually
horses), but weapons, knives, combs, or beads are
also common finds. Although single inhumations
are frequent finds, the current thought is that these
are probably not the norm, because in most instances
where sites with single burials have been re-visited,
more burials have been discovered at the site
(Eldjárn 2000:258–288, Friðriksson 2009:12–20).
Kuml have frequently been disturbed in antiquity.
These disturbances, often referred to in the literature
as “robbing”, have received surprisingly little
attention. They have been dismissed as being due to
people searching for loot. However, the frequency
and varied nature of these disturbances is such that
it is more likely that they may have been a part of the
funerary process (Pétursdóttir 2009).
The Christian cemeteries are of a different
nature. The earliest excavated sites tend to be
circular, usually surrounded by some sort of
boundary no more than 30 m in diameter. The
burials are aligned east–west, surrounding and
aligned with a central church. The graves themselves
are quite homogenous. The individuals
buried there are in a supine position, some are
found within simple wooden coffins, but there are
no grave goods (Zoëga 2008:66–68, Þórðarson
1943:134–136). These early medieval cemeteries
were most likely farm -based burial plots, serving
the farm they stood on, or perhaps the neighboring
farms (Vésteinsson and Gestsdóttir 2011).
By the 13th century, these smaller home-plots
seem to mostly go out of use, with increased
centralization of the church and the establishment of
parish-based cemeteries (Vésteinsson 2000:92). The
nature of the burials within these later sites is similar
to the earlier cemeteries. However, they often have a
much longer period of use, and many are still in use
today. Thus the complexity of the burials there is often
much greater than within the earlier smaller plots
(cf., Hallgrímsdóttir 1991:119–120). The dating of
the earliest Christian cemeteries is often problematic.
Documentary sources and/or tephrochronology
(volcanic ash dating) can often give us a clear date
as to when they went out of use, but the date of
when they came into use is often less certain, and
is often not based on any more solid evidence than
the documented date of the conversion of Icelanders
to Christianity. Recently, there has been an increase
in the radiocarbon dates available; however, there
are problems associated with these dates, as will be
discussed below as well as in the paper by Ascough
et al. (2014, this volume).
The Samples
In selecting the skeletal material, focus was
primarily on adult individuals from the early Viking
Age as the aim of the project was to identify the
early settlers of the island. Approximately 200
individuals from the pagan period or kuml have been
excavated on Iceland (Gestsdóttir 2004). A total
of 127 skeletons were eventually sampled for the
present study, including 99 from the pagan period.
Of these specimens, about 30% are well preserved.
There were no children included in the sample; the
youngest individuals fell in the 18–25 age group.
Approximately 68% of the sampled individuals are
male and 32% are female (Gestsdóttir 1998).
These burials are found around Iceland, often
within a few kilometers of the coast (Fig. 1).
The burials come from 54 sites. A large number
of the samples, 25 skeletons, came from single
inhumations. Where there were multiple burials
from the same site, an attempt was made to sample
all the individuals. In all instances where skeletons
from burials within grave groups have been left out,
it has been because either there was no preserved
dental enamel, or the skeletons were inaccessible for
sampling (Gestsdóttir and Price 2006). An attempt
was made to obtain an even geographical distribution
of samples. However, this strategy was hampered
by concentrations of the burials, with 2 major
clusters of excavated gravesites, one in the north of
Iceland and the other in the southwest of the country.
Thus a large proportion of the samples are from
these areas.
As previously noted, the pagan period or kuml in
Iceland is traditionally considered to last from the
first settlement towards the end of the 9th century
until AD 1000. Of the pagan period skeletons sampled
here, 22 (47.8%) have datable grave goods. In
most instances where there are no grave goods, there
is no clear archaeological dating for these burials
(Eldjárn 2000). An additional 44 individuals were
sampled from 2 early Christian cemetery sites; 33
skeletons from the site of Skeljastaðir in southern
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Iceland dated to the 9th to the early 11th century
(Sveinbjörnsdóttir et al. 2010, Þórarinsson 1968,
Þórðarson, 1943) and 11 skeletons from the site of
Haffjarðarey in western Iceland dated to the 11th–
16th century (Steffensen 1945).
For the Christian burials, the remains from
2 cemeteries, Skeljastaðir in Þjórsárdalur and
Haffjarðarey in Haffjörður (Fig. 1), were analyzed.
The cemetery at Skeljastaðir was excavated in 1939
by the then state antiquarian Matthías Þórðarson, as
a part of a Nordic project involving the excavation
of 8 Viking age farms in Þjórsárdalur (Þórðarson
1943). The cemetery had been greatly disturbed
before the excavation. Records from last decades of
the 19th century detail the erosion of the site (Jónsson
1885), and in 1935 Eiður Kvaran, an anthropologist
at the University of Greifswald, Germany, carried
out an excavation at the site. He excavated at least
30 skeletons and took them to Germany, where they
were subsequently lost during the Second World War
(Þórarinsson 1968). Skeljastaðir is not mentioned
in any documentary sources, but the oral tradition
states that Skeljastaðir cemetery had served all of
Þjórsárdalur (Jónsson 1885).
Radiocarbon dating suggests that Skeljastaðir
cemetery may have come into use as early as the
late 9th century AD, continuing into the early 13th
century (Sveinbjörnsdóttir et al 2010:688). Previous
work suggested that burials in the cemetery ceased
when Þjórsárdalur was abandoned due to the AD
1104 eruption of Mt. Hekla (Þórarinsson 1968). On
the other hand, there are 2 previously radiocarbon
dated skeletons from the site with a date range of
1155–1220 (68.2% probability), which appear to
contradict this (Sveinbjörnsdóttir et al. 2010:688).
Fifty-six skeletons from the cemetery at Skeljastaðir
are preserved in the Icelandic National Museum,
and 33 of these were sampled. The samples used
in this study from Skeljastaðir are listed with more
information in Supplemental Table 1 (available
online at https://eaglehill.us/jonaonline/supplfiles/
jona0072-price&gestsdottir-s1.pdf, and, for
BioOne subscribers, at http://dx.doi.org/10.1656/
jona0072.s1).
The earliest documented reference to the cemetery
in Haffjarðarey dates to AD 1223. Although
it is not known when the cemetery first came into
use, it is known is that it went out of use in AD
1563, and so it was probably in use for approximately
five centuries, ca. AD 1200–1563 (Steffensen
1945). The island is severely affected by
erosion, and sources from the early 18th century
Figure 1. Sites sampled for human tooth enamel for isotopic analysis on Iceland.
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mention exposure of human skeletal remains in
the cemetery. Bones were first removed from the
cemetery in Haffjarðarey in 1905, when Vilhjálmur
Stefánsson recovered at least 50 skulls that lay on
the surface and took them with him to the United
States. There are also records of medical students
removing bones from the site for comparative
material. In AD 1945 Jón Steffensen and Kristján
Eldjárn excavated the bones from the Haffjarðarey
cemetery that are today preserved in the Icelandic
National Museum. They excavated a total of 24
in situ skeletons and removed skeletal material
representing at least 34 individuals, so the total
collection represents 58 individuals. The extent
of the erosion of the cemetery prior to the excavations
in 1945 means that it is difficult to determine
how large a proportion of the original population
was recovered (Steffensen 1945). The lack of any
dating evidence from the excavation means that
it is not known when in the period of use of the
cemetery the excavated skeletons date. A total of
ten skeletons from Haffjarðarey were sampled. For
further information on the Haffjarðarey skeletons
sampled, see Supplemental Table 1 (available
online at https://eaglehill.us/jonaonline/supplfiles/
jona0072-price&gestsdottir-s1.pdf, and, for
BioOne subscribers, at http://dx.doi.org/10.1656/
jona0072.s1).
Radiocarbon Dates
Radiocarbon dates and light isotope (carbon and
nitrogen) ratios were obtained for 37 samples from
the Iceland burials (Supplemental Table 2 (available
online at https://eaglehill.us/jonaonline/suppl-files/
jona0072-price&gestsdottir-s2.pdf, and, for BioOne
subscribers, at http://dx.doi.org/10.1656/ jona0072.
s2). These samples were measured at the Scottish
Universities Environmental Research Centre AMS
Facility (SUERC). The atomic ratio of carbon to
nitrogen (C:N) is often used as one criterion to
assess the quality of collagen preservation (Ambrose
and DeNiro 1999, van Klinken 1999). The
C:N ratio in modern collagen is approximately 3.2
(Ambrose and DeNiro 1999). The C:N values in the
37 samples from Iceland averaged 3.4 ± 0.2, with
4 values at 3.6 or above, 2 at 3.6, a single value at
3.8, and another at 4.3. The Oxford Radiocarbon
Laboratory uses values between 3.1 and 3.5 for
acceptable samples. This range would indicate that
all but 4 of the Iceland samples had well-preserved
collagen and that those dates could be considered
as reliable. For other labs and scientists, values
of 2.9–3.6 are generally accepted as indicative of
unaltered collagen. Ambrose and DeNiro (1999)
and DeNiro (1985) found a C:N values of 2.9–3.6
in well-preserved prehistoric human bone and fresh
collagen, respectively. This range would include all
but 2 of the Iceland samples.
The radiocarbon dates were calibrated using
the OxCal program, version 3. The 37 radiocarbon
dates have a wide range of years. There
are, however, some problematic dates within the
set, including a handful of dates that predate the
settlement of Iceland. These are from the sites
of Vatnsdalur (640–730), Tyrðilmýri (650–780),
Hringsdalur (660–780), and Kálfskinn (660–820).
There are several problems associated with radiocarbon
dating on Iceland (see for example Ascough
et al. 2007; 2010; 2012; 2014, this volume). One of
these is the effects of the East Greenland Current,
which carries 14C depleted waters relative to the
Atlantic currents. This means that any individuals
with a high marine diet derived from these waters
will always be dated too old (Ascough et al. 2007;
956). The effects of the East Greenland current are
most likely to have been felt in the northern and
western part of Iceland. The 4 skeletons in the current
sample are from the northern (Kálfskinn), and
western (Vatnsdalus, Tyrðilmýri and Hringsdalur)
coastal regions, and all exhibit δ13C values that
suggest a high marine diet, perhaps as much as
50%. It is therefore quite likely that the radiocarbon
dates for these individuals are too early.
There are also 3 burials within the collection
which are dated to the post-Viking period. Two
of these, Smyrlaberg (1030–1220) and Urriðaá
(1180–1275), are sites that were both recorded as
kuml during the initial reporting, although in both
cases it is noted that the lack of grave goods (Urriðaá),
and the layout of the grave (Smyrlaberg)
do not appear as typical Viking age Pagan burials
(Eldjárn 2000: 121–122, 127–129). It is therefore
likely that these are not Viking Age kuml,
although it is not certain whether they are burials
from Christian cemeteries, deviant burials, or represent
other burial traditions. The third burial that
post–dates the Viking period is more problematic,
Hafurbjarnarstaðir (1215–1285). These bones are
from one of the richer Viking age kuml grave fields
in Iceland, with graves with burial goods that are
undoubtedly from the Viking Age (for example,
spears, combs, beads, a sword). A total of 9 kuml
graves were excavated at the site, and the bones
sampled for this date came from a disturbed burial
containing several individuals. It is possible that
this disturbed burial represents a later intrusion
at the site. The probability distributions for these
dates are shown in Figure 2. The radiocarbon data
will be considered again later in this article.
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Analyses
Analytical methods have been described
in detail in a previous article on
Isotopic Proveniencing (Price 2018, this
volume). Specific sampling procedures
are outlined here. Where possible the first
molar was sampled, with approximately
¼ of the tooth removed for analysis. In
those instances where the first molar was
unavailable, an incisor, canine, or premolar
was sampled and half the tooth was
used for the analysis. Teeth displaying
pathological lesions or non-metric traits
were avoided, as were teeth that remained
fixed in the alveolar bone, even if teeth other
than the first molar were sampled. More
information on the teeth that were sampled
appears in Supplemental Table 1 (available
online at https://eaglehill.us/jonaonline/
suppl-files/jona0072-price&gestsdottirs1.
pdf, and, for BioOne subscribers, at
http://dx.doi.org/10.1656/ jona0072.s1).
This section is organized to present
the isotopic data we have collected from
Iceland. Radiocarbon dates provide some
fundamental information on the chronology
of the samples we have taken and
are very useful for examining variation
in isotope ratios over time. Next the isotopic
analyses are summarized, including
strontium, oxygen, carbon in tooth
enamel, and carbon and nitrogen in bone
collagen. In conclusion, the results of
the isotopic investigations of the human
remains from Iceland are synthesized and
put into a broader framework of the North
Atlantic colonization. Comparison of this
information with conditions on Greenland
provides an intriguing look at differences
in the adaptations of colonists in these distinct
environments.
Strontium Isotope Analysis
Prior to a presentation of the results
of the strontium isotope analysis of the
Iceland material, we briefly summarize the
bioavailable baseline for this area. Iceland
is one of the youngest landmasses on earth,
a large volcanic island created over the last
20–25 million years. The strontium isotope
ratios of these new rocks are very low, and
numerous studies have reported values that
average approximately 0.703–0.704 (e.g.,
Figure 2. Radiocarbon probability distributions for dates on 37 human
bones from Iceland.
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Christianity came to Iceland around 1000 AD. The 2
sets of graves are almost exclusively from separate
chronological periods.
A number of observations can be made from the
graph in Figure 3. It is clear that a high proportion
of the pagan individuals are non-local (32 of 83;
39%) with values greater than 0.7092. However,
no more than a single Christian individual (3%)
appears to be non-local. There is also a significant
difference between pagan and Christian burials in
terms of the mean 87Sr/86Sr for the 2 groups. Pagan
87Sr/86Sr values average 0.7095 ± 0.0035, while
the Christian graves have a mean value of 0.7074
± 0.0012. It seems to be the case that the migration
from Scandinavia and the northern British Isles had
largely stopped by the 11th century, at least in the
areas served by the Skeljastaðir and Haffjarðarey
cemeteries. It also needs to be reiterated that strontium
isotopes cannot distinguish individuals coming
from foreign areas with 87Sr/86Sr ratios similar
to the local values on Iceland. Fortunately, there
are few places around the eastern North Atlantic
rim with values below 0.709. Denmark, western
Scania in Sweden, parts of the North European
Plain and the southern areas of the Britain would
be the possible candidates.
It is also the case in Figure 3 that the non-local
pagan individuals exhibit a wide range of 87Sr/86Sr
values above 0.7092, indicative of multiple places
Moorbath and Walker 1965, Sun and Jahn 1975,
Wood et al. 2004).
As previously noted, we also have data for the
local baseline for Iceland from the geology as well as
modern plants and both modern and archaeological
animals. We have measured 1 sample of modern
barley (0.7068), modern sheep bones from 3 difference
locations on the island (0.7059–0.7069; Price
and Gestsdottir 2006), and archaeological cattle and
pig bones from northern Iceland (average of 0.7042).
Thus, we expect that the baseline for 87Sr/86Sr sources
in foods for the inhabitants of Iceland varies between
approximately 0.7040 and 0.7092. This range in tooth
enamel should identify individuals born on Iceland.
With this background in mind, the results of the
87Sr/86Sr analysis of the tooth enamel from human
burials on Iceland are presented in Supplemental
Table 1 (available online at https://eaglehill.us/jonaonline/
suppl-files/jona0072-price&gestsdottir-s1.
pdf, and, for BioOne subscribers, at http://dx.doi.
org/10.1656/jona0072.s1). The 127 values have
a mean and standard deviation of 0.7087 ± 0.03
and vary from 0.7056 to 0.7257. These data are
initially presented in a bar graph of rank-ordered
values shown in Figure 3. The baseline data from
the basalt, barley, sheep, and cows and pigs appears
on the left side of the graph, and the human samples
are sorted and ranked by pagan and Christian graves
in the main body of the graph. As previously noted,
Figure 3. A bar graph of 87Sr/86Sr values from rock, plants, animals, and both pagan and Christian humans on Iceland. The
red line marks the 87Sr/86Sr of seawater and marine foods at 0.7092.
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in individual diet varied from about 10% to 55%,
depending largely on the geographical position
(distance from the sea) of the excavation site. A
plot of isotope ratios from human bone against
distance of the burial site from the coast (Fig. 5)
reveals a dramatic decrease in δ13C values as distances
increase. This pattern is true for both the
Christian and pagan graves. Moreover the range of
δ13C values is much greater along the coast than at
the inland sites, documenting greater diversity in
coastal diets.
The same pattern can be observed in the
strontium isotope data by comparing inland and
coastal cemeteries from the early Christian period
on Iceland. We have samples from 2 cemeteries:
Skeljastaðir (33 samples) and Haffjarðarey (11
samples). Haffjarðarey is located on the west coast
of Iceland and Skeljastaðir lies approximately 50 km
inland in southwestern Iceland. We have categorized
the samples as marine, “mostly marine,” terrestrial,
“mostly terrestrial,” or foreign (the one foreigner
among the Christian burials) based on the 87Sr/86Sr
values. The lowest 87Sr/86Sr values are assumed to
reflect terrestrial diets, and the values just below
0.7092 to be marine diets. Diets designated as mostly
marine or mostly terrestrial lie between the two
extremes. A bar graph of frequency of occurrence
of these categories is shown in Figure 6. Boundaries
for the intervals for Skeljastaðir are foreign 0.7097,
marine 0.7090, mostly marine 0.7075, mostly terrestrial
0.7060, and terrestrial.
As can be seen from this graph, all of the
individuals sampled from the churchyard at the
coastal site of Haffjarðarey are characterized by
a marine diet. The burials from Skeljastaðir show
a variety of diets from marine to terrestrial, but
“mostly terrestrial” diets are most common by far.
The mostly marine diet, observed in 5 individuals
from the cemetery, may well belong to individuals
of origin. It seems very unlikely that such variation
in 87Sr/86Sr is present in a small region of Norway.
In all likelihood the high 87Sr/86Sr values represent
a number of different places in Norway and the
northern British Isles and Ireland. We will return
to the question of the homelands of these non-local
individuals in a later section of this article.
It is also the case that the 87Sr/86Sr values among
the local Icelandic individuals show a very smooth
and continuous line from values around 0.7055 to
values around 0.7092. These values reflect the range
of 87Sr/86Sr sources on Iceland, from fully terrestrial
to fully marine. An important question concerns
the reasons for this variation. On Greenland, for
example, increasing marine resources in the diet
were correlated with time as the climate deteriorated
and more food had to be obtained from the sea (e.g.,
Arneborg et al. 1999, 2012).
The distribution of the 87Sr/86Sr values in the
pagan burials is shown in a histogram in Figure
4. The distribution is clearly bimodal and
heavily skewed to the right. The lower border of
87Sr/86Sr bioavailable values on Iceland is clearly
indicated by the absence of values below 0.7055.
The low frequency of values above 0.709 records
individuals who are not native to Iceland. It is also
the case that there may be non-local individuals
among some of the 87Sr/86Sr values below 0.7092,
but these samples cannot be distinguished from
local Icelanders on the basis of strontium isotope
ratios alone. The 2 modes in the histogram likely
distinguish diets dominated by terrestrial foods vs.
diets where marine foods play an important role.
On Iceland it is probable that this distinction is related
to the location of settlement, that is distance
from the sea, rather than change over time.
A recent study by Sveinbjörnsdóttir et al.
(2010) demonstrated the relationship between diet
and settlement location using δ13C values in bone
collagen. The range of marine protein percentage
Figure 4. Histogram of 87Sr/86Sr values in human tooth
enamel of pagan burials from Iceland.
Figure 5. A plot of distance from shore vs. δ13C for human
collagen from burials on Iceland (from Sveinbjörnsdóttir
et al. 2010).
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who were born on the coast and later moved inland.
There is also a significant difference between
the mean 87Sr/86Sr values for these 2 cemeteries,
0.7086 ± 0.0005 at Haffjarðarey and 0.7070 ±
0.0011 at Skeljastaðir. These data point to site location
as the primary determinant of diet during the
Viking Period on Iceland. Change over time may
also be reflected here as the coastal cemetery at
Haffjarðarey is 100 years younger than Skeljastaðir.
Diet on Greenland is known to have become more
marine-oriented over time (Arneborg et al. 1999),
and the same may be expected for Iceland. At the
same time, the pronounced differences between the
2 sites suggest more for a geographic cause.
There is also some information regarding the role
of the sexes in migration in the 87Sr/86Sr data. In the
sample of pagan graves, 64 of the skeletons could be
determined as to the sex of the buried individual. Of
that number, 21 were female and 43 were male. Among
the non-local individuals identified by 87Sr/86Sr values
greater than 0.7092, 11 were female and 12 were male.
Thus, 52% of the females in our sample of pagan burials
were non-local, whereas only 28% of the males
were of foreign birth. There was clearly a higher incidence
of mobility among the females.
Finally, there is also information on the
length of the period of settlement on Iceland. As
noted previously, the Sagas state that the period
of colonization lasted 60 years. Comparison of
87Sr/86Sr values with the 37 individuals who were
radiocarbon dated is particularly informative. This
information is presented in graphic form in Figure
7. The dotted line in this scatterplot marks the
upper boundary of local 87Sr/86Sr values. Individuals
above this line were not born on Iceland and
are considered as arriving colonists lie above this
line. Although the sample size is limited, a number
of non-local individuals are seen throughout the
pagan period. There may be a slight decrease in the
number of individuals over time, but it is clear that
the migration to Iceland continued throughout the
pagan period.
Collagen Carbon and Nitrogen
As discussed in a previous article in this special
volume, carbon isotopes can be measured in a number
of different tissues in the human body. Carbon and
nitrogen isotope ratios in bone collagen are normally
included as part of the process of radiocarbon dating.
Both of these ratios contain information about past
human diet and the trophic level of the individual
under investigation. Bone, and specifically collagen,
is continuously remodeled during the life of the
individual so that the ratios obtained refer to the last
years of life, in contrast to the early years of life in
Figure 6. A bar graph of 43 enamel samples categorized by
diet based on 87Sr/86Sr values.
Figure 7. Scatterplot of enamel 87Sr/86Sr vs. years AD for
37 human bone samples from Iceland. The dotted line in
this plot marks the upper limit of local values on Iceland
at 0.7092.
Figure 8. Histogram of δ13C in collagen from 37 bone
samples from Iceland.
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on 37 individuals, presumed to belong to the
pagan period. Included with the resulting 14C
measurements were data on 13C and 15N isotope
ratios. The δ13C values for these 37 individuals
averaged -19.86‰ ± 1.02, with a minimum of
-17.3‰ and a maximum of 22.0‰. These data are
shown in a histogram in Figure 8 and are generally
normally distributed with a left skew. Only a
few values higher than -19.‰ or lower than -21‰.
These values point to a largely terrestrial diet
among the individuals sampled for radiocarbon
dating.
Values for 37 δ15N ratios averaged 10.15‰ ±
2.03 with a minimum of 3.7‰ and a maximum of
14.5‰. The distribution of values is shown in a histogram
in Figure 9. The histogram appears bimodal
with 2 very low values to the left. There is a primary
mode between 10‰ and 11‰ and a secondary mode
between 12‰ and 13‰. These modes likely mark
the norms for terrestrial and marine diets, respectively.
A plot of δ13C vs. δ15N (Fig. 10) for these data
shows a generally linear trend with a significant
positive correlation (r = 0.705). Specifically, as
δ13C values become more positive (more marine),
nitrogen values also increase indicating a higher
trophic level, i.e., a more carnivorous diet. There
is also a cluster of points between δ13C -19‰ and
-21‰ and between δ15N 9‰ and 13‰ where a linear
relationship is less pronounced. These values
likely reflect the role of the meat of domestic animals
in more terrestrial diets. Sveinbjörnsdóttir et
al. (2010) also report δ15N measurements of the human
bone collagen spanning 6.5‰ to 15.5‰. They
observe a similar trend between δ15N and δ13C,
where the bone collagen with the more negative
δ13C values also has the less positive δ15N values,
and vice versa.
the chemistry of enamel. It is also the case that the
carbon in the protein collagen comes largely from
the protein in consumed foods and thus contains
information largely on that component of diet.
Carbohydrates and lipids are not normally represented
in collagen carbon.
Several studies of carbon and nitrogen isotope
ratios for early Icelandic burials have been reported
(Ascough et al. 2012, Sveinbjörnsdóttir et al. 2010).
Sveinbjörnsdóttir et al. (2010) report δ13C and δ15N
from 79 human samples from pagan and early
Christian graves on Iceland. The bone collagen
samples show substantial variation in δ13C, from
-16.4‰ to -20.3‰, although most of the data lie
between -18.0‰ and -20.0‰. The mean δ13C value
of human bone collagen of the 45 skeletons studied
from the Christian gravesites was -19.39‰ ± 0.46.
The mean δ13C value of human bone collagen of
the 30 skeletons studied from pagan was -18.73‰
± 1.05.
As part of our investigations of the Icelandic
burials, we obtained radiocarbon dates
Figure 9. Histogram of δ15N in collagen from 37 bone
samples from Iceland.
Figure 10. Scatterplot of δ13C vs. δ15N for 37 samples of
bone collagen from pagan burials on Iceland.
Figure 11. Scatterplot of calibrated years AD vs. δ13C for
37 human bone samples from Iceland.
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It is also possible to compare the Christian and
pagan burials using δ13C in tooth enamel. Mean
values are actually very similar, whereas the pagan
burials show much more variable values as reflected
by the standard deviation. Average δ13C values for
the Christian samples were -15.4‰ ± 0.61, while
the pagan burials had a mean and standard deviation
of -15.3‰ ± 1.10. A scatterplot of δ13C vs. 87Sr/86Sr
confirms this pattern with the Christian values
clustered and the pagan values rather widely spread
(Fig.13).
There are 11 samples of tooth and bone from
the same individual where enamel and collagen
carbon isotope ratios can be compared. The mean
offset between these values is -4.4‰ ± 1.06, with
a maximum of -2.3‰ and a minimum of -6.6‰.
These values point to a terrestrial C3 source for food,
It is also possible to examine changes in diet
using δ13C as a proxy by plotting these values
vs. calibrated calendar years (Fig. 11). This plot
shows a gradually decreasing value for δ13C over
time—earlier inhabitants have more positive values
suggesting a more marine diet. A plot of δ15N
produces a similar picture, with trophic level decreasing
slightly over time.
Enamel Carbon Isotopes
The carbon isotope ratio, δ13C, was also
measured in 116 samples of tooth enamel from
pagan and early Christian graves on Iceland. The
mean value for this ratio was -15.3‰ ± 0.95 with
a maximum and minimum of -12.4‰ and -17.3‰,
respectively. Enamel and collagen δ13C ratios have
varied ranges of values with an average offset of
approximately 7‰ (Tykot 2004). A histogram for
the values from Iceland is shown in Figure 12. The
histogram exhibits some positive kurtosis with
slight right skew in the direction of more marine
diets.
Figure 12. Histogram of enamel δ13C for 116 samples from
Iceland.
Figure 13. Scatterplot of δ13C vs. 87Sr/86Sr for all Iceland
samples. Red = Christian; blue = pagan.
Figure 14. A diagram with a plot of δ13C collagen vs.
enamel for 11 human bone samples from Iceland with
predicted dietary contribution from Froehle et al. (2012).
Figure 15. Histogram of enamel δ18O for 117 samples from
Iceland.
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including protein. A scatterplot of δ13C collagen vs.
enamel on a standardized diagram (Froehle et al.
2012) indicates the primarily terrestrial orientation
of the diet of these individuals (Fig. 14). The high
nitrogen values associated with these carbon isotope
ratios points to a diet where meat is a major component.
Strontium isotope ratios indicate that all of
the individuals in this group are native Icelanders
and radiocarbon confirms their date from the pagan
period.
Enamel Oxygen Isotopes
Oxygen isotope ratios were measured on 117
samples of human enamel from pagan and early
Christian graves on Iceland. The mean δ18O value
was -4.86 ‰ ± 0.97 with a maximum and minimum
of between -2.23‰ and -6.94‰. A histogram of
these values is provided in Figure 15 and shows a
generally normal distribution. These oxygen values
generally fit with the expected range for Iceland.
Values reported by Fricke et al. (1995), LeColle
(1985), and others suggest an oxygen isotope ratio
with a carbonate δ18OPDB value comparable to tooth
enamel of ca. -4.4‰, which fits well with our data.
These values are also found in large parts of southern
and central Norway and across the northern British
Isles and Ireland.
It is also possible to compare averages and
ranges between the pagan and early Christian samples
from Iceland. The mean δ18O value for the 74
pagan samples was -4.91‰ ± 1.11, whereas the 32
Christian samples had a mean and standard deviation
of -4.76‰ ± 0.67. The difference in means, while
not significant, is of interest and may reflect the fact
that there are a large number of samples from the
inland Christian cemetery where oxygen isotope
ratios may be somewhat less negative. A plot of δ18O
vs. 87Sr/86Sr for Christian and pagans (not shown)
closely resembles the plot of δ13C vs. 87Sr/86Sr with a
cluster of Christian samples and a widespread scatter
of pagan individuals.
Oxygen isotopes should vary geographically as
discussed previously. A plot of δ18O vs. 87Sr/86Sr
for the pagan burial samples from Iceland provides
some insight on this variation (Fig. 16). The dotted
red line in this plot marks an 87Sr/86Sr value of
0.7092 and the upper boundary for Icelandic natives.
All of the individuals to the right of this line
are non-local to Iceland. For the native individuals
to the left, the variation in oxygen isotope ratios
is considerable and comparable with the variation
seen in the non-locals. This pattern suggests that
the range of δ18O on Iceland lies between roughly
-4.0‰ and -7.0‰, with a few individuals more
positive than -4.0‰.
Summary of the Isotope Analyses
These isotopic investigations of diet and mobility
among the early Icelandic settlers have
revealed substantial new information. Individuals
born outside of Iceland could be readily identified
by strontium isotope ratios above 0.7092.
There was substantial migration during the Pagan
period and almost none during the early Christian
period on Iceland. Comparison of radiocarbon
dates and strontium isotope ratios for 37 individuals
indicated that while the majority of individuals
in the sample came during the early years of
settlement, new migrants continued to arrive
throughout the Pagan period.
A large proportion (39%) of the pagan burials
we analyzed were not born in Iceland, implying
a very high rate of migration. A much higher
proportion of females (52%) were identified as
migrants compared to males (28%), although there
were only half as many female as male graves. a
fact that has important implications. Investigations
of modern and ancient DNA have indicated
that females from northern Britain and Ireland are
heavily represented among the colonists of Iceland.
Given this it is also the case that among the nonnative
Icelanders that multiple places of origin are
indicated by diverse 87Sr/86Sr values, suggesting
that Western Norway was not the only source of the
colonists who traveled to Iceland.
The strontium isotope data also revealed that the
inhabitants of Iceland exhibited values varying from
approximately 0.706 to 0.7092, the highest ratio of
isotopes available. This continuous range of values
reflects varying diets from fully terrestrial to almost
fully marine among the inhabitants. While there is
Figure 16. Scatterplot of δ18O vs. 87Sr/86Sr for the pagan
burial samples from Iceland. The dotted red line marks an
87Sr/86Sr value of 0.7092, the boundary for local vs. nonlocal
on Iceland.
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a slight tendency for diets to be more marine over
time, the terrestrial component of diet appears to
vary more directly with the location of settlement as
coastal sites have strongly marine diets and inland
localities generally lack foods from the sea.
Carbon and nitrogen isotope ratios were also
measured in bone collagen from 37 individuals as
part of the radiocarbon dating procedure. The carbon
isotope ratios averaged -20‰ and the δ15N 10‰.
As noted previously, human consumers of terrestrial
plants and animals typically have δ15N values
in bone collagen of 6–10‰ whereas consumers of
freshwater or marine fish and mammals may have
δ15N values of 15–20‰ (Schoeninger and DeNiro
1984, Tykot 2004). The carbon in the Icelandic
bone collagen points to terrestrial food sources and
the nitrogen isotopes emphasize a predominance of
animal protein in the diet.
Carbon isotope ratios in enamel apatite reiterate
the importance of terrestrial foods. Both the offset
in the ratios between collagen and apatite carbon
values the plot of these values on a standardized
diagram (Froehle et al. 2012) emphasizes the
terrestrial diet of these individuals. The high
nitrogen values associated with these carbon isotope
ratios points to a diet where meat is a major component.
The Christian and pagan burials have very
similar mean δ13C enamel values, but the pagan burials
exhibit much more variation. Oxygen isotopes
are variable, and values generally fall in a range
that encompasses those found in Iceland, southern
Norway, and northern Britain and Ireland. The variation
in these values that is observed likely reflects
both the variety of places that these individuals came
from and the natural variation in oxygen isotope
ratios in human tooth enamel. Comparison of the
Icelandic isotopic information with the data from
Norway, Greenland, and elsewhere can be found in
the concluding chapter of this volume.
Beyond the details of life and death provided by
the isotopic data, there are larger implications for
the archaeology of Iceland and the North Atlantic
in terms of the characterization of burials and the
identification of a large segment of the population,
which does not appear among the burials that have
been excavated (Vésteinsson and Gestsdóttir 2016,
this volume). Perhaps an even greater lesson is the
power of archaeological sciences to elucidate new
information from the past.
Implications of the Isotope Analyses
Based on this new information it is possible to
examine some of the patterning of settlement on
Iceland and how the results reflect on the nature
of burial archaeology. The results for the Christian
cemeteries have been discussed elsewhere (Price
and Gestsdóttir 2006:139–142), so the focus of the
discussion here will be on the results of the analysis
of the Viking Age remains.
The Book of the Settlements chronicles the
settlement of Iceland, the earliest versions of which
date to the 13th century. It records that Iceland was
settled in ca. AD 874 and states that the entire country
was settled simultaneously and that the process
was rather swift, lasting only 60 years (Karlsson
2000:12). Archaeological evidence supports this
late 9th-century date of the first settlement, with little
evidence of human activity in Iceland preceding
the settlement layer (landnámslag), a volcanic tephra
layer dated to AD 872 ± 2 (Grönvold et al. 1995,
Vésteinsson 1998:2–4). Various estimates of the
size of the population of Iceland for the settlement
period have been put forward. The number of immigrants
into the country has been estimated at
approximately 20,000 and that the population at
the end of the settlement period (930) was approximately
30,000–35,000 (Eldjárn 2000:256).
Earliest documented population figures in Iceland
are the first national census carried out in 1703. At
the time the population was approximately 50,000
people, and remained so until the early 19th century
(Garðarsdóttir 2002:36). There have, however, been
suggestions that the population during the medieval
period may have reached as high as 70,000
(Vasey 1996:367). Two plague epidemics during
the 15th century partially explain the decrease. The
first was in 1402, which resulted in the death of
approximately 50–60% of the population and the
second in 1494, during which an estimated 30–50%
of the population died (Karlsson 1996:265). It is
of course impossible to know what the population
growth rate would have been in 10th-century
Iceland. However, it has been documented that
short-term population growth in small populations
is often very high, reaching as much as 0.5–2% per
year (Chamberlain 2009:281). A population growth
rate of 0.5% would mean that that by the year 1000
the population of Iceland would have been approximately
60,000 people.
As with data on population size, the earliest data
on crude death rates in Iceland are from the 18th
century. In that period and towards the last decade
of the 19th century, the crude death rate in Iceland
was 20–40 per 1000 population (Garðarsdóttir
2002:37). Based on such figures, it can be estimated
that 95,000–100,000 people died during the first 130
years of the settlement of Iceland. If these figures of
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from Viking Age burials in Iceland. These burials,
the kuml, rather than being representative of the
burial tradition of the Viking Age period in Iceland
as a whole, are most likely rather representative of
a subgroup of that population, they are mostly the
adult males, and probably the adult males of high
standing. People of lower standing—slaves, indebted
free men, and even children—were not provided with
the kuml graves. In preferably selecting to sample
the skeletons from burials which can be dated to the
Viking Age with certainty, that is those burials with
typologically datable grave goods, it is very likely
that this bias has been emphasized even further—a
biased sampling process of a biased sample.
The bias within the Icelandic Viking burial
record is reiterated when one looks at the ratio of
immigrant women versus immigrant men. Of the 83
skeletons in the sample 65 could be sexed (in general
the preservation of skeletal material from Icelandic
kuml is quite poor and does therefore not always
allow for sexing of the remains). Of these 44 were
male and 21 were female reflecting the 2:1 ratio of
men to women in the burials. However, 11 of the
females were immigrants (52% of the total females
sampled), as opposed to 12 (27%) of the males. So
although males represent a larger proportion of those
buried in Viking age burials, a higher percentage of
the females were immigrants. This could also be a
reflection of the nature of immigration as discussed
above. That is, that a large proportion of the women
living in Iceland during the first 130 years of settlement,
are represented by a trickle of female immigrants
over a long period of time being brought
in to balance the ratio of men to women. However,
if we look at the sex ratio in Viking Age burials in
Norway, it appears to be even more imbalanced than
within the Viking age burials in Iceland, closer to a
ratio of 3:1 males versus females. In Norway this is
explained as being due to a status difference, that is,
that a majority of the Viking age burials excavated
in Norway are high-status burials rather than representative
of the population as a whole (Dommasnes
1992:5).
It must be noted here that in discussing the burials
in Kaupang, where 10th-century female burials only
make up for 24% of the total. Stylegar (2007:82–
83) points out that it is important to differentiate
between gendered burials (based on grave goods)
and sexed burials (based on osteological diagnosis
of sex). It is not possible to ignore the fact that the
imbalance between the 2 sexes may be created to
some extent by the fact that gendering male burials
based on artefacts (for example, weapons) may be
easier than female burials because the latter may be
the number of settlers, the population growth rate,
and crude death rate are true, one would expect the
immigrants to make up for approximately 20% of the
population that lived in Iceland during the first 130
years of the settlement, a much lower figure than the
very minimum of 39% immigrants demonstrated by
the results of the strontium analysis. These numbers
do not take into account the effect that return migration
would have had on the demography. However,
as return migrants would most likely have been the
immigrants themselves who in turn would be replaced
by new migrants, (Gmelch 1980:136) these
figures are unlikely to have had an effect on the proportion
of immigrants within the skeletal population.
This discrepancy needs explaining. One factor
that needs to be considered is the sample selection
process. As already stated the burials that could be
securely dated to the Viking period were preferably
selected, and a large proportion of these were from
graves that contained grave goods. It must therefore
be questioned whether in selecting the individuals
from burials with datable grave artifacts a biased
sample towards the immigrants was created? To
answer this question, it is important to consider
the demography of the skeletal population from the
Icelandic kuml as a whole. The samples taken for
this project were all from adult individuals, and it is
of course very likely that a large proportion of the
deaths in settlement period Iceland would have been
due to high infant mortality during the settlement
period.
Infant mortality numbers are not known for this
period; however, data from the early 19th century in
Iceland suggests that at that time infant mortality was
300 per 1000 live births (Garðarsdóttir 2002:20). It is
therefore striking that only 2 infants (under 2 years of
age) have been found in Viking age burials making
up only 1% of the skeletal population (Gestsdóttir
1998:10–17). Similarly, there is an imbalance between
the sexes. Of the 109 individuals for whom
sex could be determined, only 35 (32%) were female
(Gestsdóttir 1998:5). It is expected within a migrant
population to see a higher percentage of males than
females; for example, in transatlantic migration during
the 19th-century women were only 40% of the
population (Harzig et al. 2009:119). However, it is
unlikely that such an uneven ratio would be seen in
a sample representing a 130-year period of a population.
It would be expected that by the second or third
generation, the ratio would have evened out to something
closer to 1:1.
These discrepancies perhaps indicate that the bias
seen in the results of the strontium isotope analysis is
merely the bias within the existing skeletal collection
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this volume, Sveinbjörnsdóttir et al. 2010:686);
Daðastaðir, where a late 10th-century trefoil broach
in the Borre style was found (Eldjárn 2000:363–
365); and Sílastaðir which included 10th-century
beads (Hreiðarsdóttir 2005:165).
The fact that immigrants are found at all the
sites that can be dated to the latter half of the 10th
century would suggest that a significant percentage
of immigrants were arriving in Iceland well into the
10th century. These results indicate that rather than
the settlement process involving an influx of people
for a relatively short period during the late 9th and
early 10th century, the settlement “period” seems to
have lasted much longer, into at least the latter part
of the 10th century. The fact that only one immigrant
was found in the sample of 44 (2%) taken from early
Christian cemeteries, Skeljastaðir and Haffjarðarey
(Price and Gestsdóttir 2006:140), would indicate
that the period of intensive settlement had ended
by the time they came into use, at least in the areas
which these cemeteries served.
Further supporting this are the results of the
strontium analysis of some of the larger kuml burial
grounds, in particular Dalvík and Sílastaðir, in the
north of Iceland. These burial grounds have been
considered as farm-based plots, that is, that the
individuals buried there all belong to the same farm
(Eldjárn 1974:133), although more recent work has
opened up the possibility of there being more than
one kuml cemetery on each farm, or the possibility
of a single plot representing burials from more than
one farm (Friðriksson 2009:10–11).
The results from the 2 above-mentioned sites can
perhaps shed some light on what would have been
the nature of the occupation of these sites. From
Dalvík there are 8 samples (5 men and 3 women). Of
these 6 individuals (3 of the men and all of the women)
were immigrants into Iceland. However, if one
looks at the results of the strontium analysis there
is a great variation in the signature, from 0.7099 to
0.7257. The same pattern is seen at Sílastaðir. Four
individuals (3 men and 1 woman) were buried at the
site, and all were found to be immigrants. The variation
in the strontium ratio signature was from 0.7093
to 0.7182., which indicates that the immigrants buried
at these sites originated from different areas. In
other words, within these farm-based plots we are
not dealing with people who originated from the
same place, settled together on the same farm and
were buried with their family or descendents. One
issue is that these burials are from early excavations,
which means that the stratigraphy of the burials is
not known, so it is not possible to tell how contemporary
the graves in the group are.
more likely to not contain gender-specific artifacts.
What we do know is that the demography of the
Norwegian Viking Age graves would not have been
affected by immigration patterns as the Icelandic
graves would have, and so it is questionable as
to whether the high ratio of men to women in the
Icelandic kuml can be explained focusing only on the
effects of immigration on the demography of the first
years of the settlement of Iceland. Perhaps a more
likely explanation is simply that immigrant women
of a high enough standing were given burial in kuml,
much more commonly than men were.
One of the main problems with dealing with
these issues is associated with the dating of the
burials. Based on documented sources, the practice
of burying in kuml dates from the first settlement
until the Christianization of Iceland in AD 1000
(Karlsson 2000:33–36). Only a handful of kuml
have been dated through tephrochronology, and all
of them fit into this period. Similarly, those graves
that have datable artifacts mostly date to the 10th
century (Eldjárn 2000:473–475). Radiocarbon
dates do exist for kuml burials, some of which extend
into the 11th century, whereas others predate
the late 9th century time of settlement by as much
as 200 years (Ascough et al. 2007:948, Price at
al. 2018, Sveinbjörnsdóttir et al. 2010:686–688).
However, recent work on radiocarbon dating from
kuml and middens in northern Iceland indicates that
the effect of both the marine reservoir (which has
been affected by the East Greenland current) and
geothermally derived CO2 in the groundwater are
distorting the radiocarbon dates and ageing those
affected as much too old (Ascough et al. 2007,
2010). Recent work in trying to solve the issue of
the freshwater reservoir effect suggests that this is
an issue that will not be resolved (Ascough et al.
2014, this volume). On the other hand, due to the
short period during which people were being buried
in kuml (approximately 130 years) coupled by the
plateau in the calibration curve between ca.780 and
ca. 980 (Sveinbjörnsdóttir 2010:23), it is unlikely
that even with secure radiocarbon dating a good
chronology could be achieved.
However, what does become clear when
surveying those burials sampled for this project is
that the immigrants are just as likely to be found in
the burials that can be dated to the latter part of the
period. Three sites, all from northern Iceland can
be dated to the latter part of the 10th century, and
immigrants are found in all of these sites. These are
Dalvík, where 2 independent radiocarbon dates exist
for one of the immigrant skeletons which indicate a
late 10th-century date for the site (Price et al. 2015,
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the Christianization of Iceland in AD 1000 burial in
Christian cemeteries took over.
Conclusions
The questions raised by the results of this project
are several. What should be considered an Icelandic
Viking Age burial? Because of the problem with
dating the burials, in many instances only those
burials that include grave goods are considered to
be Viking Age graves. For example, Kuml og haugfé
(Eldjárn 2000), a catalogue of all Viking Age burials
in Iceland, contains several finds of isolated graves
which are topographically akin to kuml and are
clearly not associated with a traditional Christian
cemetery. Because of the lack of grave goods, these
burials are not included in the main catalogue, but
are reported in a smaller font within the book as a
sort of anomalous group. Thus, the current way of
dealing with burials in Iceland is to try and fit all
finds into either the kuml or the Christian cemetery
category, and anything that does not fit neatly into
either group is considered as a sort of anomaly of
one or the other.
What the demography of the kuml burials
coupled with the results of the strontium analysis
indicates is that perhaps it is time to abandon such
simplistic views, that Icelandic burial archaeology
cannot be simply split into 2 groups. The typical
Viking age kuml burials, the burials with grave
goods and frequent episodes of disturbance in antiquity,
are representative of a subgroup of the population,
consisting mainly of males of high standing and
immigrant women, rather than being representative
of the population of Iceland as a whole. So, at this
stage it becomes a question of semantics, what is it
that we mean when we talk about kuml burials within
Icelandic archaeology: is it a Viking burial, or is it a
specific type of a Viking burial?
In other words, within the Icelandic burial
record all kuml are Viking Age burials, but all
Viking Age burials are not necessarily kuml. Such
ideas are not new to the burial archaeology of the
Norse. In his paper, Dying and the dead: Viking Age
mortuary behavior, Neil Price wrote, “After more
than a century of excavations there can remain no
doubt whatever that we cannot speak of a standard
orthodoxy of burial practice common to the whole
Norse world” (Price 2008:257). He goes on to
discuss local variation in Norse burial practice in
Scandinavia at the community, village, or even
farmstead level (Price 2008:257–258). To assume
that these local variations disappear once Iceland is
settled would seem a drastic oversimplification.
The results of the strontium isotope analysis of the
Viking Age material can also inform the pattern of settlement
at regional levels. By the 10th-century Iceland
had been divided into 4 quarters: north–Norðlendingafjórðungur
(33 individuals were sampled for the
strontium project); south – Sunnlendingafjórðungur
(14 individuals sampled); east—Austfirðingafjórðungur
(29 individuals sampled) and west–Vestfirðingafjórðungur
(7 individuals sampled) for political
and administrative purposes (cf., Karlsson 2000:22–
25). The number of samples from each quarter is
varied and in no instance very high, and so any conclusion
reached as to their meaning have to be made
cautiously. However, there is one factor that is quite
noteworthy if one looks at these results; the findings
from Norðlendingafjórðungur, where 55% of the
individuals sampled are clearly not born in Iceland, a
much higher percentage than the 39% of the country
as a whole. The significance of this must be questioned.
It has long been noted that a large proportion
of Viking Age burials have been found in the north of
Iceland. A popular explanation for this is that much
more intensive roadwork, associated with a denser
modern population, means that more kuml are found
in these areas, and that those in the west for example
where very few kuml burials are known, simply have
not been found yet (Eldjárn 1974:133). However,
the high percentages of kuml in the north could be
explained by the fact that there simply are more kuml
burials located there. That is, that the type of burial
we most easily recognize as kuml, are most common
in the north of Iceland. Others have put similar ideas
forward, for example, Sigurðsson (2000:28) mentions
in a footnote that there is “something dubious” about
the lack of kuml burials in the Westfjords of Iceland.
As discussed earlier, the Viking age burial in Iceland,
kuml, is a well-identified archaeological feature,
or so we would like to believe. A recent M.A.
thesis points out the discrepancy in recent works as
to how to classify a kuml, resulting in very varied
figures as to the number of known Viking kuml in
Iceland (Sigurðarson 2009:15). At the same time,
very little focus is put on trying to explain those burials
that are not included in the count of kuml burials
each time. However, as has been demonstrated here,
whatever method is used to count the kuml, the
demography of these burials indicates that they are
not representative of the entire population of Iceland
during the 9th–10th century, there are only a handful
of children and the ratio of men versus women is
imbalanced. There remains therefore the issue of the
nature of burials in the settlement period in Iceland.
The traditional, perhaps simplistic view is that the
first settlers buried their dead in these kuml, but after
Journal of the North Atlantic
T.D. Price and H. Gestsdóttir
2018 Special Volume 7
161
This of course raises the question, where are
the rest? The short answer to that is we don’t know.
One issue is the dating of the earliest Christian
cemeteries. It is recorded in the Book of the
Settlements that Christians were among the first
settlers (Karlsson 2000:16), and, undoubtedly, they
would have buried their dead according to Christian
customs. Recently published radiocarbon dates
from the early Christian cemeteries at Skeljastaðir
and Keldudalur cannot exclude an early 9th-century
date for some of the burials there (Sveinbjörnsdóttir
et al. 2010:687–688), although it must be noted
that these dates do not take into account the possibility
of a freshwater reservoir affect as pointed
out by Ascough et al. (2010). On the other hand,
as has already been mentioned, conclusive dating
of the start of use of many medieval cemeteries is
often lacking. For example, the previously published
dates of the start of use of the cemetery at
Skeljastaðir in Þjórsárdalur to ca. 1000 (Þórðarson
1943:134) seems to be largely based on the documented
date of the Christianization of Iceland, so it
cannot be excluded that some of the Christian cemeteries
were in use during the settlement period.
Another issue which possibly has even a greater
effect is the fact that most of the Viking Age burials
found to date belong to the typical kuml group
as already described plainly because we recognize
them. We know where they are located — just
outside home-field boundaries or on the junction
of farm boundaries and roads. We know what
they look like; low mounds sometimes with low
stone-lined borders. Even more frequently, as has
been demonstrated in the past few years by a kuml
project in the north of Iceland, the kuml are found
due to the fact that when the graves were “robbed”
in antiquity they were left open and so they are
easily recognizable in the landscape because of
shallow depressions in the ground (Friðriksson
2009:10–16). We know what to look for and where
to find the kuml, and so we go out and we find
them. The same can be said for the early Christian
cemeteries. They are located near farm mounds,
bordered by a low circular boundary surrounding
a central structure, so we go out and find them.
It has been theorized that these early Christian
cemeteries may have been modeled on the Pagan
burial grounds (Vésteinsson and Gestsdóttir 2016,
this volume). However, if these early Pagan burial
grounds are not as easily recognized in the landscape,
it could be that we simply are not finding
them, or even not recognizing them when we do
find them. Therefore, we place the graves found
within them in an “anomalous” group.
From this perspective, any burial that does
not fit into a previously defined burial group gets
dismissed as an anomaly and is often forgotten
as a footnote in an archive somewhere. So, this is
where the search needs to start looking for the rest.
Within the Icelandic archaeological archive there are
countless records of burial finds, whether the records
are textual in nature or skeletal finds. To begin to
answer the question of where the rest of the Viking
population of Iceland is buried, we need to go back
to this data, and interpret it on its own merit rather
than trying to fit it into our preconceived ideas as to
what an Icelandic burial should look like.
Acknowledgments
Hildur would like to thank the Icelandic Centre
for Research (RANNIS) for funding parts of this
study. We would also like to thank Phillipa Ascough
for her help with the radiocarbon dates.
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