Harald Lübke

The Baltic Sea basins, some of which only submerged in the mid-Holocene, preserve Stone Age structures that did not survive on land. Yet, the discovery of these features is challenging and requires cross-disciplinary approaches between archeology and marine geosciences. Here, we combine shipborne and autonomousunderwater vehicle hydroacoustic data with up to a centimeter range resolution, sedimentological samples, and optical images to explore a Stone Age megastructure located in 21 m water depth in the Bay of Mecklenburg, Germany. The structure is made of 1,673 individual stones which are usually less than 1 m in height, placed side by side over a distance of 971 m in a way that argues against a natural origin by glacial transport or ice push ridges. Running adjacent to the sunken shoreline of a paleolake (or bog), whose youngest phase was dated to 9,143 ±36 ka B.P., the stonewall was likely used for hunting the Eurasian reindeer (Rangifer tarandus) during the Younger Dryas or early Pre-Boreal. It was built by hunter–gatherer groups that roamed the region after the retreat of the Weichselian Ice Sheet. Comparable Stone Age megastructures have become known worldwide in recent times but are almost unknown in Europe. The site represents one of the oldest documented man-made hunting structures on Earth, and ranges among the largest known Stone Age structure in Europe. It will become important for understanding subsistence strategies, mobility patterns, and inspire discussions concerning the territorial development in the Western Baltic Sea region.

We present new AMS ¹⁴C dates and technological characteristics of an enigmatic osseous implement – the T-shaped antler axe. T-shaped axes (T-axes) are made of red deer (Cervus elaphus L.) antler beams with the perforation for a shaft through the removed trez tine. Our study centres on 33 axes from Belarus, Latvia and Lithuania, most of which were found during drainage of wetlands or sediment extraction in the 20^th century, and thus remained unknown internationally. We successfully dated 19 of these artefacts, and here we compare their dates to published dates of T-shaped antler axes from western Europe (Belgium, The Netherlands, western Germany, Scotland), the southwestern Baltic (Denmark, northern Germany and northwestern Poland) and southeastern Europe (Ukraine). Radiocarbon results suggest the gradual spread of this specific antler tool producing technique from southern Europe towards the Baltic during the 6^th millennium BC. The technological characteristics of T-axes in combination with the radiocarbon data enable us to preliminary discuss the chronology of aspects of T-axe production.

Publisher: Klaipėdos universitetas, Journal: Archaeologia Baltica, Title: T-shaped antler axes in Lithuania - previously unrevealed Middle Holocene hunter-gatherer technology, Authors: Tomas Rimkus, Adomas Butrimas, Harald Lübke , This paper discusses one of the most characteristic hunter-gatherer osseous implements — the T-shaped antler axe. These are made from red deer (Cervus elaphus) antler beam by removing the trez tine and creating a perforation for a shaft in its place. This type of axe is quite widely known in the Late Mesolithic and Early Neolithic contexts of northern, western and central Europe. Until now, T-shaped antler axes have been only sporadically mentioned in research on Lithuanian prehistory. Ten T-axes are currently known from eight find locations, concentrated in western and southern Lithuania. These axes were mainly discovered as single finds during wetland drainage or peat extraction. Only two excavated sites contained T-axes in settlement refuse layers. This paper provides details of the find circumstances and technological features of all ten axes, as well as the results of AMS 14C dating. The dating suggests that this technology had already spread among hunter-gatherers in the territory of Lithuania as early as the second half of the 6th millennium, and continued at least until the transition to the 4th millennium cal BC.

Understanding the landscape evolution and human-environmental interaction within it is one of the key tasks of early Holocene research. As mobile hunter–gatherers leave few traces of structural organization, understanding their habitats is relevant for comprehending these people. Rarely does the spatial distribution of artifacts correspond to the real pattern of past human activity, but rather shows the pattern of identified artifacts. Geophysical investigations try to fill this gap and have been applied increasingly in archaeological prospection delivering landscape reconstruction, which are verified and fine-tuned using corings and excavations. Despite promising 3D models, a tool to predict the location of undiscovered former human presence and the conditions which influenced people to move across the landscape is not well developed. The primary goal of this paper is to present a methodology for connecting spatial patterns of past human activity based on archaeological and geophysical data. We discuss different GPR (ground-penetrating radar) facies classified at the shoreline of the former Lake Duvensee and geomorphological variables, which leads to the possibility of understanding where and why people chose preferred areas to settle on former islands. We also demonstrate that Mesolithic hunter–gatherer groups preferred dry areas with access to open water for short-term campsites and flatter and more protected areas for specialized and repeatedly occupied campsites. The cardinal orientation of a campsite seems to be secondary to the local peat over-growing process and access to water.

The shift to the early Holocene in northern Europe is strongly associated with major environmental and climatic changes that influenced hunter-gatherers’ activities and occupation during the Mesolithic period. The ancient lake Duvensee (10,000–6500 cal. BCE) has been studied for almost a century, providing archaeological sites consisting of bark mats and hazelnut-roasting hearths situated on small sand banks deposited by the glacier. No method is yet available to locate these features before excavation. Therefore, a key method for understanding the living conditions of hunter-gatherer groups is to reconstruct the paleoenvironment with a focus on the identification of areas that could possibly host Mesolithic camps and well-preserved archaeological artefacts. We performed a 16-channel MALÅ Imaging Radar Array (MIRA) system survey aimed at understanding the landscape surrounding the find spot Duvensee WP10, located in a hitherto uninvestigated part of the bog. Using an integrated approach of high-resolution ground radar mapping and targeted excavations enabled us to derive a 3D spatio-temporal landscape reconstruction of the investigated sector, including paleo-bathymetry, stratigraphy, and shorelines around the Mesolithic camps. Additionally, we detected previously unknown islands as potential areas for yet unknown dwelling sites. We found that the growth rates of the islands were in the order of approximately 0.3 m²/yr to 0.7 m²/yr between the late Preboreal and the Subboreal stages. The ground-penetrating radar surveying performed excellently in all aspects of near-surface landscape reconstruction as well as in identifying potential dwellings; however, the direct identification of small-scale artefacts, such as fireplaces, was not successful because of their similarity to natural structures.

Archaeological research at ancient Lake Duvensee began almost 100 years ago and has recently revealed another early Holocene site, Duvensee WP 10, which was excavated from 2016 to 2020. Here, we will present the first results of the investigations. The site shows several characteristics known from other sites within the area. However, it is noteworthy that, in comparison to the other local campsites, several discarded animal bones were found – an archaeological find group that is almost lacking in the micro-region. Dense scatters of flint artefacts and hazelnuts represent the majority of the find spectrum and indicate a mainly undisturbed, single-phased site as corroborated by the radiocarbon dating and the stratigraphy. Furthermore, the results show that the lake level at ancient lake Duvensee must have dropped significantly shortly after the occupation of Duvensee WP 10 and that people used the site for processing hunted animals, artefact production, and hazelnut roasting.

A collection of 141 bone and antler tools and debitage pieces recovered from the River Užava at the village of Sise constitutes the largest Mesolithic osseous assemblage in western Latvia. Radiocarbon dating of 12 pieces suggests that most of this collection dates from the 6 th millennium calBC. We present a general analysis, highlighting typical and unique tool forms, ornamented and sculpted pieces, and assess the corpus in a wider geographical context. Predominant in this rich and diverse collection are heavy duty antler tools: various forms of adzes, axes and hammers as well as sleeves, made either from shed antler or antler of hunted animals. They include two pieces classifiable as T-axes. Spear- and arrowheads as well as daggers are also present, along with chisels, wedges, awls and other tools. Artistic representations include five sculpted and engraved objects. The heavy duty red deer antler tools have parallels in the region south of the Baltic Sea, whereas the bone projectile forms are familiar from Kunda and Narva Culture sites of the East Baltic; the closest similarity is with osseous assemblages from coastal western Lithuania.

We present a case study of a bog showing how an integrated approach of multi-method geophysical sounding and local soil sampling can be used to identify, differentiate, and map organic sediments. Our study is based on ground-penetrating radar (GPR), electrical resistivity tomography (ERT) and shear-wave seismic (SH seismic) profiling applied to sediments of the former Lake Duvensee (northern Germany), nowadays a bog. This is a well-known locality for remains from the Mesolithic hunter-gatherers’ occupation that has been attracting archaeological and geoarchaeological research for100 years. The bog is embedded in low conductive glacial sand and is characterized by layers of different gyttja sediments (detritus and calcareous). The present study was conducted in order to identify the bog morphology and the thickness of the peat body and lake sediments, in order to understand the basin evolution. To validate the geophysical results, derived from surface measurements, drilling, soil analyses as well as borehole guided wave analysis of electromagnetic waves and Direct-Push (DP-EC) have been carried out and used for comparison. It turned out that each method can distinguish between sediments that differ in grain size, particularly between peat, lake sediments (gyttjas and mud) and basal glacial sand deposits. GPR is even able to separate between strongly and weakly decomposed peat layers, which is also clear considering resistivity variations in the ERT computation. From the association between geophysical properties and sediment analysis (e.g., water content and organic matter) different gyttjas were distinguished (coarse and fine) and seismic velocity was correlated to bulk density. Moreover, GPR and SH-wave seismics present different resolutions, confirming that the latter allows measurements, which are more focused on determining the extension of basal sand deposits, the depth of which is difficult to reach with GPR. Representative values of electrical resistivity, dielectric permittivity, and shear wave velocity have been determined for each sediment type and are therefore available to complete the investigation of wetland environments. Fine grained lake sediments were difficult to differentiate by the applied methods. This could be a result of high ionic concentration within the permanent groundwater body, partly masking the sediment properties.

Based on an internal workshop: ZBSA Schleswig March 14th–16th 2016, concerning the project: »Neubewertung von Chronologie und Stratigraphie des frühholozänen Fundplatzes Hohen Viecheln (Mecklenburg-Vorpommern) unter besonderer Berücksichtigung der diagnostischen Knochenartefakte« (»Re-evaluation of the chronology and stratigraphy of the early Holocene site Hohen Viecheln (Mecklenburg-Vorpommern, Germany), with particular focus on the diagnostic bone artefacts«), which is granted from May 2015 to October 2016 by the German Research Foundation (DFG) the workshop will set the wider frame for comparison of the site Hohen Viecheln.