North-Eastern Europe in the Stone Age – bridging the gap between the East and the West

chalcolithic_early_corded_ware

Interesting PhD thesis The Stone Age of north-eastern Europe 5500–1800 calBC : bridging the gap between the East and the West by Kerkko Nordqvist (2018).

Some interesting excerpts:

On the Corded Ware and related cultures

The arrival of Corded Ware is without a doubt the clearest example of migration recognized in Finnish Stone Age archaeology. Its appearance has been understood to result from the movement of a new population from the southern or southeastern Baltic Sea area to the southern and western coasts of Finland (Europaeus 1922: 137; Luho 1948: 57; Edgren 1970: 62; Matiskainen 1994: 14) (Fig. 36). Native inhabitants of the coastal region — presented as representatives of Comb Ware population — have rarely been given any larger role in this development (Luoto 1986: 19; Asplund 1995: 74; see also Article III), and their fate has usually been described as displacement, assimilation or some kind of co-existence (Äyräpää 1952a: 24–25; Edgren 1997: 169–171; Carpelan 1999: 263–264; Núñez 2004: 362).

Another important part of the Finnish narrative is the distance that the Corded Ware population assumedly kept, not only from the (Pöljä Ware-producing) hunter-gatherers inhabiting the Finnish inland, but also from the other Corded Ware groups in the northern Baltic Sea area (Edgren 1970: 61; Äyräpää 1973: 199, 207; Carpelan 1999: 266).56 The image of Finnish Corded Ware is static: it is seen to exist in the area of present-day Finland facing little change for centuries (Edgren 1992: 96; see also Luoto 1986: 17; Matiskainen 1994). However, the archaic nature assigned to Corded Ware derives greatly from the out-dated idea of pan-European A-horizon, unrealistic dating given for the phenomenon, as well as an overly narrow view of cultural dynamics concerning what can be accepted as Corded Ware (cf. Furholt 2014; Article III).

The only larger change has been connected to the so-called 2nd wave of Corded Ware, supposedly reaching Finnish coasts from Estonia towards the end of Corded Ware’s existence. However, this event has never really been substantiated, and in Finnish assemblages it seems to materialize only through the so-called sharp-butted axes (see Soikkeli 1912; Äyräpää 1952b: 89–90) (Fig. 37) — pottery related to the 2nd wave has never been presented, although its influences are recognized in later pottery types (Carpelan 1979: 15; Carpelan et al. 2008: 206; see also Lavento 2001: 24–25). Along the northern limit of Corded Ware, in the so-called Middle Zone, the 2nd wave assumedly contributed to the creation of hybrid pottery, which in the earlier research has been vaguely called Middle or Intermediate Zone Ceramics (Carpelan 1979: 15; 2004b: 52). More recently it has been proposed that such mixing of influences and hybridization would have started immediately or soon after the arrival of Corded Ware at least on the south-eastern coast and the Karelian Isthmus, and influences would have been transmitted towards the inland and the middle-zone, too (see Mökkönen 2011: 62–63; Article III; see also Carpelan 1999: 262).

asbestos-tempered-wares
Distribution of the so-called Middle and Late Neolithic asbestos- and organictempered wares. Organic admixtures were commonly used in wide regions to the east and south-east of the research area during this time as well, but asbestos-tempered pottery has only occasionally been reported from areas further east of Lake Onega, the Vologda and Arkhangelsk Oblasts (see Ошибкина 1978; Козырева 1983; Жульников 2007). Illustration: K. Nordqvist.

On assumed early Corded Ware materials in North-East Europe

The emergence of Corded Ware was previously dated in Finland as early as 3200 calBC (Edgren 1992: 92; Matiskainen 1994: 14; Carpelan 2004b: 48–49). The age was based on a few conventional dates from mixed contexts, and has been lately readjusted to around 2900–2800 calBC (Mökkönen 2011: 17–18; Article III). This has not only moved the dating closer to the initial dates given to Corded Ware in Europe (Włodarczak 2009), but also changed the cultural context into which Corded Ware may have arrived in north-eastern Europe. The old dating permitted the assumption of a temporal overlap with Typical/Late Comb Ware (see Edgren 1970: 59–60; see also Carpelan 1999: 262) — with regards to the new dating, even if the Comb Ware tradition continued in some form to the 3rd millennium calBC, it is really not known how the coastal societies transformed and what they looked like during this time. All in all, only a few sites have been securely dated to the 3200–2800 calBC period, which makes estimating all the mechanisms through which Corded Ware was established quite complicated.

Most Corded Ware materials derive from mixed, multi-period settlement contexts, which explain the generally limited knowledge about Corded Ware assemblages. Pottery is the most commonly identified element, although its study has been heavily concentrated on beakers and beaker-like cups: apart from so-called short-wave moulded vessels, household pottery is not much recognized (Edgren 1970: 25–26; see Nordqvist & Häkälä 2014: 18–19). Furthermore, apart from individual remarks, organic tempers have been excluded from the Corded Ware technological repertoire in Finland (Edgren 1970: 33; Korkeakoski- Väisänen 1993: 15) — as shown in Article III, organic-tempered Corded Ware is present at least on the Finnish southern coast and the Karelian Isthmus, and has been reported from Southern Ostrobothnia as well. Organic-tempered pottery found in southern Finland is similar to the so-called Estonian (or Late) Corded Ware, which is thought to be the result of local development (Янитс 1959: 166; Kriiska 2000: 75; see also Kholkina 2017: 155) (Fig. 38). Even preliminary mapping of such pottery (Finnish data is still based on non-systematic survey) shows that an interaction sphere existed in the eastern Gulf of Finland area, reaching from Estonia to the areas of present-day Finland and the Karelian Isthmus in Russia (Article III) (Fig. 36). Sharp-butted axes fit well into this context: rather than being an indication of some ambivalent and unidirectional 2nd wave of influence, they provide better evidence of more continuous contacts across the sea.

The origins and spread of Corded Ware have become highly topical in the last few years with the development of analytical techniques such as genetic and isotopic research (Allentoft et al. 2015; Haak et al. 2015; Sjögren et al. 2016; Kristiansen et al. 2017). Generally, archaeogenetic studies have evidenced large population replacements in Europe, and seem to provide solid support for migration — still, numerous problems related to representativity and interpretation of the data remain to be solved (see Vander Linden 2016; Heyd 2017; Ion 2017). No material is available for such studies from the research area, as no bones have been preserved in the excavated burials. The closest analysed and published individuals from Estonia, Latvia and Lithuania (Allentoft et al. 2015; Jones et al. 2017; Mittnik et al. 2018; Saag et al. 2017) show that the development of Corded Ware in the Baltic States clearly involved newcomers. At the same time, archaeological materials from north-eastern Europe also indicate the input and presence of indigenous people — settling this discrepancy between different source materials is an important task for future research.

On modern political borders and preconceptions defining archaeological cultures

The results presented above illustrate how the modern political borders may appear to be present in the past. For Finnish prehistory they mean also that instead of one ‘Finnish’ group, there are several Corded Ware populations operational within the present-day state. Recent geochemical analyses of clay pastes and grog tempers of Corded Ware have pointed towards the existence of different pottery recipes in different parts of Finland, as well as towards connections and movement across the northern Baltic Sea area (Holmqvist et al. 2018).

corded-ware-finland-estonia
The area of Battle Axe/Corded Ware cultures (shaded), with the traditional limit of Finnish Corded Ware shown as a solid line. The distribution of organic-tempered (Estonian) Corded Ware is marked with a dashed line, while the so-called Middle Zone is indicated roughly by hatching. Illustration: K. Nordqvist.

In the present-day Russian territory, a Corded Ware presence has been recognized on the Karelian Isthmus (Крайнов 1987b: 61, Карта 6). In Finnish archaeology this area has been mostly considered a periphery of Finnish Corded Ware (Äyräpää 1952a: 22–23; 1973: 207; Meinander 1954a: 151–152; Huurre 2003: 236; Carpelan et al. 2008: 206), but the identification of organic-tempered Cored Ware in areas north of the Gulf (as well as mapping of all stray finds; Nordqvist & Häkälä 2014; Article III) shows that a Corded Ware presence on the Isthmus was stronger than thought. In other words, the normative perception of culture and strong presuppositions of what Corded Ware should be has led to the exclusion of part of the material culturethe Karelian Isthmus was not just a subsidiary area of Finnish Corded Ware, but a region with its own character and tradition.

No Corded Ware pottery finds have been reported in the areas north of Lake Ladoga. The solitary Corded Ware influences noted in simultaneous Karelian pottery have been connected with the central Russian Fatyanovo culture (Жульников 1999: 53–54; 2008: 419). Because the Fatyanovo territory extends close to the research area in the east and south-east (see Крайнов 1987b: 61, Карта 6; see also Жульников 2008: 417, Рис. 3), it is not surprising that recent studies have revealed evidence of connections between the eastern Gulf of Finland and central Russian battle axe cultures (Kriiska et al. 2015: 47; Крийска et al. 2015: 201; Article III; see also Kholkina 2017: 154–155).

People prefer ethnolinguistic identification “large and early”

The East has been mostly contextualized through the cultural entity perceived to exist between the Baltic Sea and the Urals, i.e. the ‘Comb Ware cultural sphere’. Its binding elements have been kinship- and exchange-based connections, which would have transmitted influences over this vast area. Karelia, the closest-lying region of the East, has been occasionally mentioned as an important area of influence (Tallgren 1938b; Äyräpää 1944), but generally it has not been given any prominent position in the narratives. In fact, Karelia and much of the Comb Ware sphere gained their insignia and paraphernalia already during the first half of the 20th century, and only fairly petrified stereotypes have been presented in the subsequent literature.

On the arrival of the Metal Ages, influence from Pre-Proto-Germanic, and the reasons for the genetic bottleneck

Periodization-wise the question is straightforward: the Neolithic ends with the onset of the Early Metal Period, the Eneolithic (in Russia) and the Bronze Age (in Finland).

A much larger problem affecting the study of transition has been the general decrease and even lack of archaeological material pertaining to this time. This situation prevails in large areas from the later 3rd millennium calBC onwards and is accentuated during the 2nd millennium calBC. The disappearance of archaeological evidence has been explained by decreasing population numbers which would have been caused by the deteriorating climate (Lavento 2015: 125; see also Sundell 2014). Nevertheless, in the territory of present-day Finland the abundant number of burial cairns (see Meinander 1954b: 89–120; Saipio 2011) as well as pollen analyses showing anthropogenic activities dating to this time (see Alenius et al. 2009; Augustson et al. 2013) indicate that no complete depopulation took place. Therefore, in addition to sparse habitation, the change must be explained also through changing ways of living and material cultures, which make the material remains more difficult to identify archaeologically (also Lavento 2015: 125, 132).

The changes taking place during this time seem to be connected to external influences. On the coast, the Kiukainen culture is thought to have transformed under Scandinavian influences into the so-called Western Bronze Age, exhibiting changes in their settlements, material culture, means of subsistence and their world view (Meinander 1954b: 196–197; Lavento 2015: 198–199). Development further east, in the areas previously occupied by populations producing asbestos and organic-tempered wares, is characterized by the appearance of so-called Textile Ware, apparently introduced there by a new population originating from the south-east and ultimately from the Volga region (Meinander 1954b; Гурина 1961; Косменко 1992; Lavento 2001). Even though it is not clear what the relationships between the carriers of this new tradition and the local populations were (did the latter perish, assimilate, or coexist?), it is evident that changes took place in all fields of life — and the traditional image of an archaic, static inland is not considered correct anymore (see Saipio 2008; Lavento 2015). However, this does not imply one synchronous or abrupt change or a complete turnover but, for example, traditional forms of subsistence held their ground alongside (slash and burn) agriculture for centuries, even millennia to come.

All in all, a complex account of events in North-East Europe that will define the ethnolinguistic identification of Corded Ware migrants.

Related:

Corded Ware pastoral herding economy and belief system through mortuary practices

chalcolithic_early_corded_ware

On the scent of an animal skin: new evidence on Corded Ware mortuary practices in Northern Europe, Antiquity (2018) 92(361):118-131.

Abstract (emphasis mine):

The Late Neolithic Corded Ware Culture (c. 2800–2300 BC) of Northern Europe is characterised by specific sets of grave goods and mortuary practices, but the organic components of these grave sets are poorly represented in the archaeological record. New microscopic analyses of soil samples collected during the 1930s from the Perttulanmäki grave in western Finland have, however, revealed preserved Neolithic animal hairs. Despite mineralisation, the species of animal has been successfully identified and offers the oldest evidence for domestic goat in Neolithic Finland, indicating a pastoral herding economy. The mortuary context of the goat hair also suggests that animals played a significant role in the Corded Ware belief system.

Excerpts:

Although the material culture used in Corded Ware funerary rituals is well known, a full appreciation of the associated mortuary practices is still lacking. In fact, even though evidence for internal wooden and stone structures is commonly documented in Corded Ware mortuary contexts (e.g. Fischer 1956; Malmer 1962; Hansen 1994; Vander Linden 2007), detailed information on the ways that structures within the grave might have been furnished is largely missing. The use of textiles, mats and furs to cover grave pit walls and floors is commonly documented in Yamnaya Culture graves (Heyd 2011). This culture represents the best-known proxy for the incoming gene-flow that occurred in Europe during the third millennium BC, resulting in the formation of the Corded Ware phenomenon (Allentoft et al. 2015; Haak et al. 2015; Kristiansen et al. 2017). Similar practices may, therefore, have occurred in the Corded Ware tradition. In fact, the Corded Ware graves already show strong affinities to the Yamnaya burial rituals; for example, in the practice of a single inhumation under a barrow (Kristiansen et al. 2017: 336). New information on Corded Ware mortuary practices has come from the northern periphery of the cultural area. The results are based on microscopic analyses conducted on soil samples collected from the Perttulanmäki Corded Ware grave in western Finland (Figure 1). These analyses suggest that a goat skin had been placed in the grave. This discovery is important as it provides clear evidence of a mortuary practice that has only in rare cases been previously suspected (e.g. Torvinen 1979; Meurkens et al. 2015).

corded-ware-finland
Location of the Perttulanmäki site. The distribution of the Corded Ware phenomenon in Finland is marked in
orange. Map: K. Vajanto.

The animal accompaniment could be present in various forms. Several Corded Ware burials in the Baltic area have been furnished with artefacts made of domestic animal bone (Zagorska 2006: 103; Lõugas et al. 2007: 25–26; Larsson 2009: 63). That all milk residues from Finnish Corded Ware pottery were found exclusively in beakertype ‘drinking’ vessels (Cramp et al. 2014: 4) further supports this idea. These beakers are usually found in grave deposits (Edgren 1970: 76–77; Larsson 2009: 352), so the animal could have also been represented by placing milk, or a vessel connected with milk, in the grave (Edgren 1970: 76–77; Larsson 2009: 352). This being said, it must be noted that, due to the vast distribution area of the Corded Ware phenomenon, the same objects or symbols might not have been connected with the same ideas (Furholt 2014: 82). Moreover, some prehistoric societies might have also repeated the ritual practice simply as tradition—after its original meaning had been forgotten (Nilsson Stutz 2003: 319).

Interesting indeed regarding the culture behind Corded Ware herders in the Baltic Sea (quite likely speakers of Uralic languages) but also formally the emphasis on Yamna as a proxy population for Corded Ware migrants (which we had already seen in geneticists answering to criticism).

Interesting also how an article about the Corded Ware culture selects Volker Heyd – an expert in Yamna migration and in the Yamna -> Bell Beaker migration, who rejects a relationship between Yamna and Corded Ware migrants, and between Corded Ware and Bell Beaker peoples – over Kristiansen and his IE-CWC research group, who are supposedly the fashionable experts in CWC right now for certain amateur geneticists…

It would seem as if academic pressure is making the hype around (the wrong interpretations of) the 2015 papers (and the group behind them) fade…

See also:

More evidence on the recent arrival of haplogroup N and gradual replacement of R1a lineages in North-Eastern Europe

sejma-turbino-phenomenon

A new article (in Russian), Kinship Analysis of Human Remains from the Sargat Mounds, Baraba forest-steppe, Western Siberia, by Pilipenko et al. Археология, этнография и антропология Евразии Том 45 № 4 2017, downloadable at ResearchGate.

Abstract:

We present the results of a paleogenetic analysis of nine individuals from two Early Iron Age mounds in the Baraba forest -teppe, associated with the Sargat culture (fi ve from Pogorelka-2 mound 8, and four from Vengerovo-6 mound 1). Four systems of genetic markers were analyzed: mitochondrial DNA, the polymorphic part of the amelogenin gene, autosomal STR-loci, and those of the Y-chromosome. Complete or partial data, obtained for eight of the nine individuals, were subjected to kinship analysis. No direct relatives of the “parent-child” type were detected. However, the data indicate close paternal and maternal kinship among certain individuals. This was evidently one of the reasons why certain individuals were buried under a single mound. Paternal kinship appears to have been of greater importance. The diversity of mtDNA and Y-chromosome lineages among individuals from one and the same mound suggests that kinship was not the only motive behind burying the deceased people jointly. The presence of very similar, though not identical, variants of the Y chromosome in different burial grounds may indicate the existence of groups such as clans, consisting of paternally related males. Our conclusions need further confi rmation and detailed elaboration. Keywords: Paleogenetics, ancient DNA, kinship analysis, mitochondrial DNA, uniparental genetic markers, STR-loci, Y-chromosome, Baraba forest-steppe, Sargat culture, Early Iron Age.

Baraba-West-Siberian-Plain-Eurasia
From the older study of the same region (Baraba, numbered 4) “Location of ancient human groups with a high frequency of mtDNA haplogroups U5, U4 and U2e lineages. The area of Northern Eurasian anthropological formation is marked by yellow region on the map (References: 1. Bramanti et al., 2009; 2. Malmstrom et
al., 2009; 3. Krause et al., 2010; 4. this study)”

baraba-cultures-chronology
Chronological time scale of Bronze Age Cultures from the Baraba region
This is the same team that brought an ancient mtDNA study of different cultures within the Baraba steppe-forest region (from the Open Access book Population Dynamics in Prehistory and Early History).

The Baraba steppe-forest is a region between the Ob and Irtysh rivers (about 800 km from west to east), stretching over 200 km from the taiga zone in the north to the steppes in the south.

The new study brings a more recent picture of the region, from the Iron Age Sargat culture, ca. 500 BC – 500 AD, with five samples of haplogroup N and two samples of haplogroup R1a.

R1a lineages in the region probably derive from the previous expansion of Andronovo and related cultures, which had absorbed North Caspian steppe populations and their Late Indo-European culture.

N subclades prevalent in certain modern Eurasian populations are probably derived from the expansion of the Seima-Turbino phenomenon.

While samples are scarce, Y-DNA data keeps showing the same picture I have spoken about more than once:

N subclades (potentially originally speaking Proto-Yukaghir languages) gradually replacing haplogroup R1a (originally probably speaking Uralic languages), probably through successive founder effects (such as the bottlenecks found in Finland), which left their Uralic culture and ethnolinguistic identification intact.

Therefore, late Corded Ware groups of North-Eastern Europe (in the Forest Zone and the Baltic), mainly of R1a-Z645 subclades, probably never adopted Late Indo-European languages.

Related:

New preprint papers on Finland’s population history and disease, skin pigmentation in Africa, and genetic variation in Thailand hunter-gatherers

finland-genetics

New and interesting research these days in BioRxiv:

Haplotype sharing provides insights into fine-scale population history and disease in Finland, by Martín et al. (2017):

Finland provides unique opportunities to investigate population and medical genomics because of its adoption of unified national electronic health records, detailed historical and birth records, and serial population bottlenecks. We assemble a comprehensive view of recent population history (≤100 generations), the timespan during which most rare disease-causing alleles arose, by comparing pairwise haplotype sharing from 43,254 Finns to geographically and linguistically adjacent countries with different population histories, including 16,060 Swedes, Estonians, Russians, and Hungarians. We find much more extensive sharing in Finns, with at least one ≥ 5 cM tract on average between pairs of unrelated individuals. By coupling haplotype sharing with fine-scale birth records from over 25,000 individuals, we find that while haplotype sharing broadly decays with geographical distance, there are pockets of excess haplotype sharing; individuals from northeast Finland share several-fold more of their genome in identity-by-descent (IBD) segments than individuals from southwest regions containing the major cities of Helsinki and Turku. We estimate recent effective population size changes over time across regions of Finland and find significant differences between the Early and Late Settlement Regions as expected; however, our results indicate more continuous gene flow than previously indicated as Finns migrated towards the northernmost Lapland region. Lastly, we show that haplotype sharing is locally enriched among pairs of individuals sharing rare alleles by an order of magnitude, especially among pairs sharing rare disease causing variants. Our work provides a general framework for using haplotype sharing to reconstruct an integrative view of recent population history and gain insight into the evolutionary origins of rare variants contributing to disease.

finland-migration-haplotype
Migration rates and haplotype sharing within Finland and between neighboring countries. A) Map of regional Finnish, Swedish, and Estonian birthplaces Purple triangle indicates St. Petersburg, Russia. Hungary not shown. 1 Finnish, Swedish, and Estonian region labels are shown in Table S3. B) Principal components analysis (PCA) of unrelated individuals, colored by birth region as shown in A) if available or country otherwise. C-D) Migration rates inferred with EEMS. Values and colors indicate inferred rates, for example with +1 (shades of blue) indicating an order of magnitude more migration at a given point on average, and shades of orange indicating migration barriers. C) Migration rates among municipalities in Finland. D) Migration rates within and between Finland, Sweden, Estonia, and St. Petersburg, Russia. Available under a CC-BY 4.0 International license.

Interesting to understand this paper is the whole research published by the Institute for Molecular Medicine Finland (FIMM): their website contains detailed research on Finland’s recent genetic history.

NOTE: The featured image of this article contains three figures from the FIMM (License CC-BY 4.0). Left: Position of the points represents the locations of 1042 Finnish individuals. By clustering the individuals into two groups based on genome data we see a split between eastern (blue) and western (red) parts. Individuals who show considerable relatedness to both groups have been colored with cyan. Both parents of each individual were born close to each other and based on the parents’ birth years we can infer that we are looking at the genetic structure present in Finland before 1950s. Center: An estimated borderline of the Treaty of Nöteborg on top of the map from the left. The border line is drawn between Jääski (28.92 N, 61.04 E) and Pyhäjoki (24.26 N, 64.46 E). Right: The settlement border divides Finland into the early settlement region (to west and south of the border) and the late settlement region (to east and north of the border) (Jutikkala 1933, s. 91). We see that Southern Savo (in south-eastern part of the early settlement) is among the only parts of the early settlement region that is dominated by the eastern genetic group. Information from Matti Pirinen and Sini Kerminen, 24.5.2017.

An Unexpectedly Complex Architecture for Skin Pigmentation in Africans, by Martin et al (2017):

Fewer than 15 genes have been directly associated with skin pigmentation variation in humans, leading to its characterization as a relatively simple trait. However, by assembling a global survey of quantitative skin pigmentation phenotypes, we demonstrate that pigmentation is more complex than previously assumed with genetic architecture varying by latitude. We investigate polygenicity in the Khoe and the San, populations indigenous to southern Africa, who have considerably lighter skin than equatorial Africans. We demonstrate that skin pigmentation is highly heritable, but that known pigmentation loci explain only a small fraction of the variance. Rather, baseline skin pigmentation is a complex, polygenic trait in the KhoeSan. Despite this, we identify canonical and non-canonical skin pigmentation loci, including near SLC24A5, TYRP1, SMARCA2/VLDLR, and SNX13 using a genome-wide association approach complemented by targeted resequencing. By considering diverse, under-studied African populations, we show how the architecture of skin pigmentation can vary across humans subject to different local evolutionary pressures.

Contrasting maternal and paternal genetic variation of hunter-gatherer groups in Thailand, by Kutanan et al. (2017):

The Maniq and Mlabri are the only recorded nomadic hunter-gatherer groups in Thailand. Here, we sequenced complete mitochondrial (mt) DNA genomes and ~2.364 Mbp of non-recombining Y chromosome (NRY) to learn more about the origins of these two enigmatic populations. Both groups exhibited low genetic diversity compared to other Thai populations, and contrasting patterns of mtDNA and NRY diversity: there was greater mtDNA diversity in the Maniq than in the Mlabri, while the converse was true for the NRY. We found basal uniparental lineages in the Maniq, namely mtDNA haplogroups M21a, R21 and M17a, and NRY haplogroup K. Overall, the Maniq are genetically similar to other negrito groups in Southeast Asia. By contrast, the Mlabri haplogroups (B5a1b1 for mtDNA and O1b1a1a1b and O1b1a1a1b1a1 for the NRY) are common lineages in Southeast Asian non-negrito groups, and overall the Mlabri are genetically similar to their linguistic relatives (Htin and Khmu) and other groups from northeastern Thailand. In agreement with previous studies of the Mlabri, our results indicate that the Malbri do not directly descend from the indigenous negritos. Instead, they likely have a recent origin (within the past 1,000 years) by an extreme founder event (involving just one maternal and two paternal lineages) from an agricultural group, most likely the Htin or a closely-related group.

Related:

Collapse of the European ice sheet caused chaos in northern and eastern Europe until about 8000 BC

deglaciation-europe-east

A new paper with open access has appeared in Quaternary Science Reviews, authored by Patton et al.: Deglaciation of the Eurasian ice sheet complex, which offers a new model investigating the retreat of this ice sheet and its many impacts.

According to the comments of professor Alun Hubbard, the paper’s second author and a leading glaciologist:

To place it in context, this is almost 10 times the current rates of ice lost from Greenland and Antarctica today. What’s fascinating is that not all Eurasian ice retreat was from surface melting alone. Its northern and western sectors across the Barents Sea, Norway and Britain terminated directly into the sea. They underwent rapid collapse through calving of vast armadas of icebergs and undercutting of the ice margin by warm ocean currents.

Some speculate that at some points during the European deglaciation, this river system had a discharge twice that of the Amazon today. Based on our latest reconstruction of this system, we have calculated that its catchment area was similar to that of the Mississippi. It was certainly the largest river system to have ever drained the Eurasian continent.

One thing that we show pretty well in this study is that our simulation is relevant to a range of different research disciplines, not only glaciology. It can even be useful for archaeologists who look at human migration routes, and are interested to see how the European environment developed over the last 20,000 years.

Interesting is its effect on population movements in eastern Europe, including the steppe, the forest-steppe, and the Forest Zone, during the Younger Dryas period and thereafter.

Another, recent build-up article on this model also by Patton and cols. of december 2016, in the same journal, is The build-up, configuration, and dynamical sensitivity of the Eurasian ice-sheet complex to Late Weichselian climatic and oceanic forcing. A summary is found at the University of Tromso website.

Discovered via News at Phys.org.

Featured image: Younger Dryas period, from the article.