Lithic Artifacts Research Articles

Using microartifacts to infer Middle Pleistocene lifeways at Schöningen, Germany

While archeologists usually favor the study of large and diagnostic lithic artifacts, this study illustrates the invaluable contribution of lithic microartifacts for interpreting hominin lifeways. Across a 64 m2 area of the Middle Pleistocene lakeshore site of Schöningen 13 II-3 in Northern Germany, we recovered a total of 57 small and micro flint artifacts, four small debris pieces, three natural fragments and three bone retouchers in close association with the skeleton of an extinct Eurasian straight-tusked elephant (Palaeoloxodon antiquus). This area lacks the type of formal knapped stone tools that would normally constitute the focus of archeological interpretations. By adopting a holistic approach, including morpho-technical analysis, experimental archeology, and use-wear and residue analyses, we demonstrate that these small and microartifacts are resharpening flakes that tell the story of the site. Fifteen resharpening flakes preserve microwear traces of processing wood. Microscopic residues of wood adhered to the former working edges of the tools corroborate this observation. Additionally, hominins used a sharp-edged, natural fragment of flint to process fresh animal tissue, which likely originates from the butchery of the elephant. These results provide unique, 300,000-year-old evidence for the functionally interconnected use of lithic, osseous and wood technologies. Furthermore, we document in-situ transformations of stone tools and the presence of both curational and expedient behaviors, thereby demonstrating the temporal depth of hominin activities at the lakeshore where the elephant died, and in the broader landscape as a whole.

The Becoming of a Prehistoric Landscape: Palaeolithic Occupations and Geomorphological Processes at Lojanik (Serbia)

Accomplishing long-term plans to harvest and modify natural resources has been a crucial skill for the survival of our species since early Prehistory. Research on this first step of production mostly focuses on the provenience study of lithic artifacts uncovered at archaeological sites, using petrographic and geochemical analyses to correlate the artifacts with potential geological outcrops. Although fundamental for understanding key aspects of landscape use and mobility, regional raw material economy, and extraction technology, Palaeolithic raw material sources have been less intensively investigated, as they are often difficult to locate and challenging to tackle with traditional archaeological approaches. Lojanik in the Central Balkans is one of the largest Prehistoric quarrying areas known in Europe, showing numerous lithic raw material outcrops exploited from the Middle Palaeolithic to the Chalcolithic periods, over an area of 18 hectares. In this paper, we present the results from our renewed research program in this region. Combining airborne LIDAR mapping, geomorphological and archaeological survey, and techno-typological analysis of lithic artifacts, we were able to reconstruct the geomorphological evolution of the landscape and its use by prehistoric societies.

Environmental variation in the early and middle Holocene Tequendama and Aguazuque archaeological sites, Colombia

This study focuses on identifying possible environmental variations and plant availability during the occupation in two archaeological sites: Tequendama and Aguazuque, located in Sabana de Bogotá, Colombia. Those sites represent periods of occupation during the early to middle Holocene that contributes valuable information about hunter-gatherers who occupied this area. Data obtained and recovered archaeological material during excavations shed light on relatively continuous occupations until the late Holocene. The presence of lithic artefacts, human and fauna bone remains offered relevant information to comprehend social dynamics among these human groups; likewise, phytolith and stable isotope analysis on sediments and fauna were carried out to identify environmental variations, and the presence of plant remains in these archaeological contexts. Carbon isotope analysis in sediments indicated the prevalence of plants C3 from the early Holocene. In turn, isotopic relationships in carbon obtained from mammals’ dental enamel found in both sites suggest that those animals consumed such types of plants. Also, isotopic values in oxygen from dental enamel show humid and possibly cold environmental conditions in both locations. Also, phytolith analyses provide evidence on the types of plants available in determined contexts and reconstruct environments, use, and availability. Those three types of analysis were applied to archaeological contexts to determine the presence of plants type C3 or C4 available in the sites, which permitted to evidence of environmental changes, humid conditions, and, in a few cases, drought across occupation, as well as the differences in terms of the presence or absence of certain types of plants during chronological periods, suggesting a possible association of horticultural processes and domestication during middle Holocene in Aguazuque archaeological site.

Rio Grande cultural remains on the middle Gila River, Arizona: The Pueblo Revolt and the Eastern Puebloan diaspora

Data recovery investigations in the Blackwater area along the middle Gila River in south-central Arizona identified ceramic and lithic artifacts derived from the Rio Grande region. These remains were collected from GR-1425, which is located at the heading of the Blackwater canal system within the Gila River Indian Community. The site lacks evidence for permanent occupation, and instead only short-term habitation occurred. Extensive evidence for weapon manufacturing suggests that the temporary relocation was associated with conflict, and radiocarbon dates suggest that the cultural remains were deposited after the Hohokam Classic period ended circa CE 1450. The most parsimonious explanation for the data from GR-1425 is that a group of Eastern Puebloans temporarily moved to the middle Gila River around the time of the Pueblo Revolt in CE 1680. As a result of increased interactions of disparate populations brought together by the extensive population movements that occurred at this time, substantial changes in regional ceramic traditions occurred, and data from GR-1425 suggest the extent of these interactions was more wide-scale than previously recognized.

Deciphering carnivoran competition for animal resources at the 1.46 Ma early Pleistocene site of Barranco León (Orce, Granada, Spain)

Barranco León (Orce, Guadix Baza, Spain) is one of the sites with the oldest evidence of human activity in south-western Europe. This site has yielded human remains in association with both fauna and lithic artefacts, linked through the presence of anthropogenic cut and percussion marks. Nevertheless, while this site is a clear example of early hominin access to carcasses, the accumulations have been identified as a palimpsest, where multiple agents including carnivorans played a role in modifying and interacting in site formation processes. From this perspective, the interpretation and study of the Barranco León site is of great difficulty. Traditionally, interpretations have presented Barranco León as an area where hominins as well as the giant hyena, Pachycrocuta brevirostris, competed for access to carcasses left by machairodontine felids, such as the saber-toothed Homotherium latidens. Nevertheless, as will be presented in this study, the complexity and trophic pressure of Barranco León is much more complicated than originally hypothesized. This study presents a detailed taphonomic analysis of carnivoran activities in the level D1 of the Barranco León assemblage. 3D modelling, geometric morphometrics, and computational learning are used to provide new insights into the tooth pits observed on faunal materials. Here we show that Canis mosbachensis plays a pivotal role in the formation of the site, followed by Pachycrocuta, Homotherium, Ursus etruscus, and Xenocyon (Lycaon) lycaonoides. From this perspective, it can be seen that while Pachycrocuta and Homotherium were active agents in the formation of the site, other carnivorans are also important agents to consider when investigating the Guadix Baza region.

Recasting the Sangoan Stone Age Techno-Complex in the Stone Age Nomenclature at Sango Bay, Southern Uganda

This paper discusses the complex use of the term ‘Sangoan’ and its placement between the Early Stone Age (ESA) and Middle Stone Age (MSA) using data from Simba Hill in Sango Bay. The purpose is to examine whether the Sangoan is Acheulean, Middle Stone Age, or an independent lithic industry at Sango Bay. Four specific objectives guided the study: reviewing the Stone Age terminology, Sangoan lithic typology, technology, and environmental characteristics. A detailed literature review of the Stone Age nomenclature shows patterns and trends of the Sangoan terminology; while a combined lithic assemblage from the archaeological surface survey and excavation yielded heavy and light-duty lithic tools. The 13 sites identified within the 202.6km surveyed had 73 lithic artefacts, while the excavation unit yielded 1344 lithic artefacts. The results suggest that the Sangoan typology at Sango Bay has five general lithic categories of shaped tools, backed pieces, cores, and debitage. Typologically, the conventional Sangoan lithics at Sango Bay include lanceolates, picks, cleavers, discoids, becs, points and core axes. Technologically, the Levallois lithic reduction strategy characterises the Sangoan with unifacial and bifacial retouch and core technology elements. The toolmakers at Sango Bay used local raw materials, suggesting they were not highly mobile in terms of raw materials. Conclusively, therefore, the Sangoan is a transitional lithic industry.

Changing the Perspective, Adapting the Scale: Macro- and Microlithic Technologies of the Early Mesolithic in the SW Iberian Peninsula

Abstract What determines the choice of a particular lithic solution from among the set of knowledge and skills that are part of the cultural background of a group? The Early Mesolithic of the SW Iberian Peninsula shows a high diversity of lithic solutions considering the various aspects of the manufacturing process. At each site, the group selects the most adequate solution to respond efficiently to the needs. Contemporary sites may document quite different lithic components; there are no recurring patterns. Macrolithic and microlithic technologies were adopted, depending on the site, but the selection of one rather than another seems to be independent of the function of the site. Then, what does dictate the choice? A number of factors come to mind such as environmental contingencies, purpose, ability, and ethnicity. This Early Mesolithic defining trait diverges from the pattern observed for the final Upper Palaeolithic, where the same constellation of tools is systematically represented in the archaeological record, as well as flint, even in regions where flint as a natural resource is absent. Macrolithic technologies directed towards the massive production of cutting edges and heavy-duty tools produced from medium coarse-grained rocks co-exist, in SW Iberian Early Mesolithic, with microlithic technologies focused on the production of small bladelets made from good quality chert types and transformed into tiny armatures. Although contemporaneous, each lithic solution has its own geographical identity. How should we study these distinctive productions while at the same time respecting their diversity? No analytical template is sufficiently comprehensible to enable us to understand the multitude of “memories” that lithics carry. However, some approaches can help us to overcome the impasse by letting us read the hidden histories that lie behind lithic artefacts.

Bovid Bone Accumulation in Late Middle Palaeolithic Poland

ABSTRACT The hunting activities of Neanderthals inhabiting the European Lowlands during the Weichsel glaciation are poorly understood due to the scarcity of faunal remains. This work concerns the puzzling accumulation of mammalian remains at the Middle Palaeolithic site Haller Av. in Wrocław, southwestern Poland. The site yielded lithic artifacts in two levels and numerous bone remains typical for steppe-tundra fauna, dominated by steppe bison (Bison priscus). As the site was transformed by fluvial processes, the question arose whether the accumulation of faunal bones was the result of human activity. To resolve this question, we used a multiproxy approach, including spatial analysis with GIS, as well as taphonomic and paleozoological analyses. It was found that the accumulation of bone remains was multi-stage and involved a large area. Only the bison remains were spatially correlated with the traces of human activity. In our opinion, these data indicate the presence of a hunting site of monospecific fauna, demonstrating the profound knowledge of Neanderthals about the ecosystem of which they were a part.

Paleoenvironment and human activity on the central Korean Peninsula during the late MIS 3 and MIS 2

AbstractLayers 12 and 13 of the Chongphadae Cave site located northwest of the central part of the Korean Peninsula include human fossils, fireplaces, a great number of lithic artefacts, and mammal remains. These layers represent new evidence for the paleoenvironment, human occupation, and activities in this region during the late MIS 3 and MIS 2, associated with global cold and dry climate, respectively. Most of lithic artefacts collected are flake tools. Raw material selection, lithic reduction technology, and lithic industry represent peculiar local characteristics. Our analysis of faunal assemblages also suggests that the Chongphadae region had a rich ecosystem capable of forming a diverse mammalian fauna including ungulates (mainly deer and horses) during this period. It is likely that the mosaic landscapes, including grasslands, forests, rivers, and wetlands, provided a favorable environment for humans, as well as mammals and plants, and the occupants of the site actively hunted and gathered in a relatively temperate environment. Our study suggests that the central Korean Peninsula was not severely affected by global dry and cold events such as LGM, although it was a somewhat humid and cold environment during the late MIS 3 and MIS 2. The central Korean Peninsula may have existed as an unknown refugium (or area of endemism) in northeastern Asia during this time.

Post-LGM environments and foragers on the move: New data from the lower Altmühl Valley (Franconian Jura, SE Germany)

After the Last Glacial Maximum, the Swabian and Franconian Jura (in SW and SE Germany, respectively) were repopulated by Magdalenian hunter-gatherers within the same communication network. However, while the Magdalenian settlement of the Swabian Jura dates to 17–14 ka cal BP, permanent Magdalenian occupations in the Franconian Jura date to 15–14 ka cal BP. In comparison with its western counterpart, the Franconian Jura was mostly excavated in the early days of archaeological research. Does this different chronology reflect the different history of research? Why did Magdalenian foragers establish permanent occupation in the Franconian Jura nearly 2 millennia after settling in Swabia, despite the fact these regions are only 150 km apart? To address these questions, we reinvestigated two sites in the Altmühl Valley with micromorphology and luminescence dating, namely Felsenhäusl-Kellerhöhle and Klausennische. Our data show that both sites have intact Pleistocene deposits. Among these, we identified sediments dating between 17 and 15 ka that show only rare lithic artifacts and microfeatures indicative of cold and arid conditions. Our work and published data suggest that the steady settlement of Magdalenian foragers in the Altmühl Valley starting 15 ka cal BP coincides with the end of this harsh period and the onset of cool and wetter environments. Data from the Swabian Jura demonstrated that in the Lone Valley, similar environments and Magdalenian occupations commenced earlier, starting 17 ka cal BP. Therefore, we propose that regional environments acted as a barrier against the dispersal of foragers in the Franconian Jura and determined its later Magdalenian occupation. Our research highlighted that different environments, taphonomic processes, and site uses probably coexisted across the German Jura. Therefore, it remains fundamental to expand the multisite data set proposed in this article to further test hypotheses about human/environment interaction in this region.

A new aspect of post-depositional alterations of lithic artefacts: the case of Medzhibozh Lower Palaeolithic assemblages

Flint artefacts have been identified in the materials of the Lower Palaeolithic sites of Medzhibozh, which have experienced the effects of post-depositional alterations (PDA). We suggest a particular combination of anthropogenic and natural effects on lithic artefacts. In the vicinity of Medzhibozh in the Khmelnytskyi region in the West of Ukraine, several multilayered stratified Lower Palaeolithic sites are currently known. Artefacts and accompanying fauna have been identified in subaerial buried soils, initial hydromorphic soils, and alluvial deposits. The ages of the artefact-bearing sediments are preliminarily estimated to be between 1.2 and 0.4 Ma. The lithic assemblages of all horizons contain technologically and typologically archaic artefacts, the industry being referred to as Mode 1. Various types of rock were used as raw materials, including locally occurring flints in the form of pebbles and flattened nodules. Flint products from many assemblages are characterized by rounding and sheen due to their extended exposure to water-permeable horizons. Most of the flint artefacts belonging to a particular assemblage are of a similar type of preservation. The assemblages also contain artefacts with surfaces of different states of preservation, suggesting that they are of different ages. These could either be products of reutilisation or natural alterations. However, more recent surfaces tend to be isolated and do not form a removals system. Moreover, most of the individual PDA pieces show a technological and morphological consistency of differently preserved surfaces, indicating that a force initiating detachment was applied simultaneously. We, therefore, consider artefacts showing a variate state of scar preservation to be PDA products. We assume we are dealing with a new aspect of post-depositional alterations of lithic artefacts. Natural alteration had subjected artefacts, which received internal damage to the structure earlier when processed by man. The bipolar-on-anvil technique was actively used at Medzhibozh. Many artefacts show signs of multiple attempts of knapping, accompanied by a change in the position of the segmenting item. Such signs are impact pits, visible cracks, and Herzian cones disturbing the rock's texture. We believe that the internal cracks that appeared in the area of the not detached spall contribute to the accelerated natural alteration of the item in this area and, ultimately, to the detachment of the flake. The probability of spalling depends on the intensity of the internal distress, the structure of the rock, the climatic conditions, and the post-depositional environment. The most responsible factor for the effect of the “time-delayed spalling” seems to be repeated cycles of temperature changes. A comprehensive study of post-depositional modifications of lithic artefacts is essential in studies of Lower Palaeolithic sites, particularly the technological Mode 1 (Oldowan). This is due to the highly heterogeneous raw materials used, the bipolar-on-anvil knapping technique, and a long period of post-discard behaviour of artefacts. Key words: Lower Palaeolithic, Medzhibozh, stone artefacts, post-depositional alterations, time-delayed spalling, taphonomy.

Assessing raw material diversity at Poverty Point (16WC5) using non‐destructive reflectance spectroscopy

AbstractLithic raw material variation is valuable for assessing the scale of human mobility, differential access to and from raw material sources, and prehistoric exchange patterns. Recent advancements in non‐destructive reflectance spectroscopy have proven to be more accurate in provenance investigations compared with the macroscopic (visual) identification technique for lithic artifacts. Here, we use visible/near‐infrared reflectance and Fourier transform reflectance spectroscopy on a collection of 845 lithic bifaces at Poverty Point (16WC5) site in northeastern Louisiana, a UNESCO World Heritage site that is well‐known for the presence of nonlocal materials, including stone tools. This study describes the first systematic approach to analyzing and interpreting hyperspectral reflectance data for cryptocrystalline silicate (e.g., chert and flint) artifacts at Poverty Point site. The chert materials identified in this study reaffirm the idea that tool stones arriving at the Poverty Point site came from diverse geologic sources, covering an expansive geographic area.

Luminescence dating at Border Cave: attempts, questions, and new results

Border Cave hosts a rare Middle and Early Later Stone Age sequence of deposits that extends as far back as ca. 250 thousand years (ka). The site's chronology has been built mainly on Electron Spin Resonance (ESR) ages obtained from teeth, conducted at the end of the 1990s, and on radiocarbon dating for the more recent layers. In order to refine the sequence's chronology, several materials were selected for luminescence dating, including 34 siliceous lithic artefacts, and quartz and feldspar grains extracted from 10 sediment samples. Since the radioisotopic contents of the cave sediments are abundant in the volcaniclastic host rock (about 2% K, 10 ppm 232Th, 2 ppm 238U in the sediments) and the ages for the lower layers are over 40 ka, high (>150 Gy) equivalent doses (De) were expected for most samples. The saturated thermoluminescence (TL) signals of the lithic artefact samples suggested either that they had not been heated in the past, or that they were already too old to be dated. The presence in the sediments of 40–63 μm quartz grains dominated by the fast Optically Stimulated Luminescence (OSL) component and with apparent high D0 values (200–1000 Gy) suggested, a priori, that they could be appropriate for measuring high Des. However, a systematic drop of the De values for these high D0 grains was observed and could not be fully understood and corrected accordingly. The recently proposed pIT protocol, together with a global growth curve (GGC) approach, was applied to 63–80 μm feldspar grains extracted from the sediment samples. The data suggest that the IR225 signal was likely not fully bleached at the time of deposition. Nonetheless, two age estimates, assumed to bracket the target age, have been calculated for each sample. These estimates are consistent with the previous ESR ages and the ESR/C14-based Bayesian models. Further improvements can be considered in the future with the pIT - GGC method, which would allow both increased accuracy and precision.

Stone‐flaking technology at Leang Bulu Bettue, South Sulawesi, Indonesia

ABSTRACTApproximately 50000 stone artefacts have been recovered from the prehistoric site of Leang Bulu Bettue (LBB), on the Wallacean island of Sulawesi, in Indonesia. This large assemblage offers the opportunity to produce a large‐scale, comprehensive model of the early lithic technologies of South Sulawesi. Through the analysis of half of this assemblage, this study identifies a technological shift between the artefacts produced ca.50–40 thousand years ago (ka) – the “Lower Industry” – and the “Upper Industry” artefacts produced ca.40–16 ka. The majority of the assemblage belongs to the Upper Industry, and these artefacts are associated with portable art, ornamentation, and the Homo sapiens remains reported in previous works. These Upper Industry artefacts are largely made on chert that was brought to the site, sometimes in the form of large flake blanks, which was further reduced within the cave and used for ochre and plant processing. Artefact reduction was strategic during this period, and the bipolar method was frequently used for controlled reduction of flakes of various sizes. This represents a shift from the technology seen on the small number of Lower Industry artefacts, recovered from the deeper deposits. The oldest lithic artefacts yet reported from the site were made on immediately available limestone pieces, which were reduced through least‐effort and non‐intensive flake removal dictated by the available platforms. This study is compared to an analysis of Pleistocene artefacts at the nearby site of Leang Burung 2, where a similar technological shift has been observed.

Interrelation between Palaeolithic and faunal remains in the central Narmada Valley, India

Abstract Whether scavenging or hunting, the consumption of large mammals is very prominent in the history of humankind. During the Lower Palaeolithic period, the abundance of large cutting tools found indicates increased meat consumption. Evidence has demonstrated this at various African and European sites where direct links between lithic and faunal assemblages have been made, for instance cut-marked bones and use-wear studies. On the Indian Subcontinent, there is a lack of direct evidence on animal remains in archaeological contexts (with one exception); however, there are numerous sites where animal fossils and lithic artefacts occur in shared contextual associations. The present paper is concerned with the relationships between the lithic and faunal assemblages in archaeological contexts, particularly the occurrence of bifaces and large mammalian fossils in Lower Palaeolithic assemblages with specific reference to the central Indian zone. Without the confirmation of anthropogenic signatures on Pleistocene faunal remains, it is not easy to assess whether a particular assemblage has the contemporaneous deposition of the two datasets or not. Here, we present a review of archaeological and faunal records in the central Narmada Valley and explore the possible associative evidence of human–animal interactions.

For Our World Without Sound: the Opportunistic Debitage in the Italian Context—a Methodological Evaluation of the Lithic Assemblages of Pirro Nord, Cà Belvedere di Montepoggiolo, Ciota Ciara Cave and Riparo Tagliente

The informative potential taken on by lithic artefacts has increased over the years. They gradually grew into proxies to detect the most relevant features of human material culture, including cognitive abilities to realise stone tools or, in other words, to track down the delineation of behavioural complexity. Consequently, notions like predetermination, standardisation (morphologically likewise) and hierarchisation have been intensely used in lithic technology as markers of such complexity, leading to ruling out contexts lacking any trace of these traits. Within the present state of the art, the use of the terms expedient and opportunism has characterised, in a negative way, the dichotomy between complex and simple within prehistoric contexts. Even if a requalification of expedient technologies has been recently observed, opportunistic behaviours still connote the complete absence of planning and complexity (even in terms of the mental scheme) within lithic industries. This background often prevented a consideration as relevant, from a technological and methodological perspective, these assemblages, primarily when Lower Palaeolithic contexts were addressed. With the definition and use of the term opportunistic debitage, this work questions the possible methodological implications of assemblages known as complexity- and planning-free and that can be found throughout different chronological and cultural phases.

An integrative geochronological framework for the Pleistocene So'a basin (Flores, Indonesia), and its implications for faunal turnover and hominin arrival

Flores represents a unique insular environment with an extensive record of Pleistocene fossil remains and stone artefacts. In the So'a Basin of central Flores these include endemic Stegodon, Komodo dragons, giant tortoises, rats, birds and hominins, and lithic artefacts that can be traced back to at least one million years ago (1 Ma). This comprehensive review presents important new data regarding the dating and faunal sequence of the So'a Basin, including the site of Mata Menge where Homo floresiensis-like fossils dating to approximately 0.7 Ma were discovered in 2014. By chemical fingerprinting key silicic tephra originating from local and distal eruptive sources we have now established basin-wide tephrostratigraphic correlations, and, together with new numerical ages, present an update of the chronostratigraphy of the So'a Basin, with major implications for the faunal sequence. These results show that a giant tortoise and the diminutive proboscidean Stegodon sondaari last occurred at the site of Tangi Talo ∼1.3 Ma, and not 0.9 Ma as previously thought. We also present new data suggesting that the disappearance of giant tortoise and S. sondaari from the sedimentary record occurred before, and/or was coincident with, the earliest hominin arrival, as evidenced by the first records of lithic artefacts occurring directly below the 1 Ma Wolo Sege Tephra. Artefacts become common in the younger layers, associated with a distinct fauna characterized by the medium-sized Stegodon florensis and giant rat Hooijeromys nusatenggara. Furthermore, we describe a newly discovered terrace fill, which extends the faunal record of Stegodon in the So'a Basin to the Late Pleistocene. Our evidence also suggests that the paleoenvironment of the So'a Basin became drier around the time of the observed faunal transition and arrival of hominins on the island, which could be related to an astronomically-forced climate response at the onset of the Mid-Pleistocene Transition (MPT; ∼1.25 Ma) leading to increased aridity and monsoonal intensity.

SUNGIR REVISITED: NEW DATA ON CHRONOLOGY AND STRATIGRAPHY OF THE KEY UPPER PALEOLITHIC SITE, CENTRAL RUSSIAN PLAIN

ABSTRACTChronological and stratigraphic frameworks are of the utmost importance for Upper Paleolithic archaeology, physical anthropology, and ecology. Wide ranging radiocarbon (14C) dates were previously obtained for the Sungir burial complex in the central part of European Russia, which is well-known as the richest funeral Paleolithic assemblage in the world yet recorded. The major problem was the contamination caused by consolidants used during the recovery of human bones in the 1960s. The stratigraphy and spatial structure of the Sungir site were also not well understood previously. New radiocarbon and stable isotope data are generated for the Sungir burials. While some dates were younger due to incomplete removal of contamination, the XAD 14C age on S-1 burial (ca. 29,780 BP) was found to be statistically the same as the previously performed HYP 14C age for this burial (ca. 28,890 BP). Four animal bones found in cultural layer below the burial date to ca. 28,800–30,140 BP, suggesting that both this layer and human burials date to roughly this age range. Narrowing these ages further is difficult considering the larger errors of the 14C dates. This shows that future research attempting to 14C date material excavated many years ago needs to eliminate potential contamination from consolidants through analyses such as FTIR, prior to 14C dating. The chronology and stratigraphy of Sungir do not contradict to correlation of its lithic artifacts with the Streletskian assemblage as the East European variant of the Final Szeletian technocomplex (Early Upper Paleolithic).

The rolling stones of Bronze Age Aegean: Applying machine learning to explore the use of lithic spheres from Akrotiri, Thera

Across the Bronze Age Aegean and Eastern Mediterranean, various small spherical lithic artefacts have been discovered. The exact use of such artefacts remains a mystery, possible interpretations suggest that they are a form of counting system or counters for board games. This paper examines the largest collection of such artefacts found in the area to-date, the 746 spheres from the prehistoric town of Akrotiri in the island of Thera (Santorini). After the spheres were assessed and traditional statistical analyses were applied, machine learning was employed to further examine clustering of the spheres and to suggest potential interpretations of their manufacture, use and deposition. The paper concludes with the suggestion that the workflow proposed here, for Akrotiri, can be used to examine patterns in similar artefact groups from the Easter Mediterranean and beyond.

Starch granule evidence for the presence of chuño at the Middle Horizon (A.D. 600–1000) site of Quilcapampa La Antigua, Peru

Chuño is created by subjecting Solanum subspecies or other tubers to a process of freeze-drying that reduces their weight and renders them highly storable. Despite the importance of chuño within traditional Andean foodways, we know strikingly little regarding the antiquity of the freeze-drying practice used to create potato chuño. In this study, we present starch granule evidence for the presence of chuño on ceramic and lithic artifacts from the Middle Horizon (A.D. 600–1000) site of Quilcapampa La Antigua, a Wari-affiliated outpost in the Sihuas Valley, Peru. We argue that damage patterns on the archaeologically recovered starch granules are consistent with expectations for chuño. This research has the potential to impact investigations into the domestication and use of potatoes by early Andean communities and other communities around the world who have incorporated potatoes into their foodways.