Stone handaxes, picks and cleavers discovered at a Lower Palaeolithic site in southern Russia may represent the oldest known Acheulean tool industry in Eastern Europe outside the Caucasus, according to archaeologists who have provisionally dated the site to between 450,000 and 400,000 years ago.
The tools were recovered from the Khryashchi archaeological site in the lower reaches of the Seversky Donets River, on the southern Russian Plain.
Researchers from the Institute for the History of Material Culture of the Russian Academy of Sciences say the distinctive large cutting tools display technological characteristics of the Early Acheulean — a major prehistoric stone-working tradition associated with some of the earliest human populations to spread across Africa and Eurasia.
Comparable Early Acheulean assemblages are known from the Caucasus, but the researchers say no equivalent industry of this age has previously been identified elsewhere in Eastern Europe.
If the proposed dating and classification are confirmed, Khryashchi could provide important evidence for how early humans expanded northwards onto the Russian Plain hundreds of thousands of years ago.
Handaxes, picks and cleavers found at Khryashchi
The assemblage contains a diverse collection of stone implements, but researchers say its most important components are large cutting and chopping tools.
These include handaxes, picks and cleavers.
Unlike simple flakes and scrapers, such implements required multiple stages of deliberate shaping and were apparently designed for repeated use.
The Khryashchi examples are particularly massive, with strong cutting edges and points.
Researchers believe they could have been used for several demanding tasks, including working wood to produce hunting weapons such as spears and clubs, manufacturing digging sticks and butchering animal carcasses.
The production of carefully shaped tools such as handaxes also provides archaeologists with evidence of the technological knowledge and planning abilities of their makers.
Their forms required the knapper to select suitable stone and progressively remove material to create a predetermined working edge or point.
According to the research team, the manufacturing techniques, composition and typology of the Khryashchi assemblage are characteristic of the Early Acheulean.
Site could be up to 450,000 years old
One of the central questions surrounding Khryashchi has been its age.
Recent investigations of the site’s sediments and ancient environment have allowed researchers to propose that people occupied the location towards the end of the Oka glaciation or around the beginning of the subsequent Likhvin interglacial.
That would place human activity there approximately 450,000 to 400,000 years ago.
“It can now be assumed that the early hunters’ camp existed at the end of the so-called Oka glaciation or at the very beginning of the subsequent Likhvin interglacial on the Russian Plain,” said archaeologist Vyacheslav Shchelinsky.
The dating remains an estimate based on the site’s geological and palaeoenvironmental context, but it would place Khryashchi deep within the Middle Pleistocene.
Conditions were relatively cold when people occupied the area.
Despite this, the site appears to have offered several advantages that repeatedly attracted early humans.
Early humans repeatedly returned to ancient riverbank
The camp stood directly beside an ancient channel of the Seversky Donets, or ancient Don river system.
According to Shchelinsky, the riverbank could have provided access to aquatic food resources, raw materials for stone tools and suitable locations for constructing temporary shelters.
The waterside setting may also have offered some protection from predators.
Nearby river crossings and watering places could have attracted animals, making the location particularly useful for mobile hunting groups.
Evidence from the sediments indicates that flooding periodically covered traces of human activity. People nevertheless returned to the location repeatedly.
Researchers therefore envision Khryashchi not as a permanent settlement but as a repeatedly occupied camp used by highly mobile groups moving through the landscape.
Tools may have been used to butcher large animals
The size and strength of the stone tools suggest that some were designed for heavy-duty work.
Researchers propose that the large cutting implements could have been used to process substantial animal carcasses, potentially including large, thick-skinned mammals such as elephants.
There is not yet direct archaeological evidence at Khryashchi demonstrating the butchery of elephants, however.
Only a small number of animal bones have so far been recovered from the cultural layer, including remains belonging to medium-sized ungulates such as horses and deer.
The researchers suggest that preservation conditions may explain the scarcity of animal remains. Organic material can deteriorate over hundreds of thousands of years, leaving stone artefacts as the dominant surviving evidence of human activity.
The presence of ungulate bones within the archaeological layer nevertheless strengthens the possibility that hunting and carcass processing formed part of the activities conducted at the site.
Possible connection with the Caucasus
The origins of the Khryashchi tool-making tradition present another major question.
According to the research team, its technology and tool forms closely resemble Early Acheulean industries known farther south.
Comparable assemblages have been identified in the Caucasus, particularly in the western Ciscaucasus and on the Taman Peninsula.
The researchers consequently propose that the technological tradition represented at Khryashchi could ultimately have arrived on the Russian Plain from the Caucasus.
One possibility is that the site’s inhabitants — or earlier generations of the same population — migrated northwards from the Caucasus during the early Middle Pleistocene.
Researchers suggest such movement may have become possible during periods when the Manych Strait, which at times created a geographical obstacle between the Caucasus and territories farther north, was absent or passable.
For now, however, this remains a migration hypothesis based primarily on similarities between stone-tool traditions and palaeogeography. Additional sites and more precise chronological evidence will be required to establish how early human populations reached the southern Russian Plain.
Acheulean technology spread across the Old World
Acheulean technology represents one of the longest-lasting technological traditions in human prehistory.
It first appeared in Africa more than 1.5 million years ago before eventually becoming widespread across large parts of Eurasia.
Its most recognisable artefacts are bifacially worked handaxes, although Acheulean assemblages can contain a much broader range of large cutting tools, picks, cleavers, flakes and other implements.
Because manufacturing these tools involved deliberate shaping and repeated sequences of stone removal, archaeologists use them to investigate technological knowledge, learned traditions and the cognitive capabilities of early human populations.
The appearance of distinct Acheulean traditions across Eurasia can also provide evidence for prehistoric population movements and contacts.
At Khryashchi, researchers believe the combination of handaxes, picks and cleavers is sufficiently distinctive to classify the assemblage within this technological tradition.
New evidence for the first inhabitants of the Russian Plain
The identity of the humans who made the Khryashchi tools has not been established.
No human fossils are reported from the site so it is the stone artefacts themselves that provide the main evidence for behaviour of people who occupied the riverbank hundreds of thousands of years ago.
Their presence nevertheless shows that early humans could exploit the environments of the southern Russian Plain during a period of major climatic change.
The Khryashchi site is now viewed by the research team as a key location for reconstructing earliest stages of human occupation in this vast region.
Future excavations will refine its chronology, reconstruct the ancient environment and recover more archaeological material.
Research is expected to continue in 2027.
If further evidence supports the proposed age and Early Acheulean classification, Khryashchi could change the archaeological picture of early human expansion into Eastern Europe: groups with sophisticated handaxes and other large cutting tools on the Russian Plain as early as 450 kya.
Sources : Russian Academy of Sciences
