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(a final version of this paper has now been published by Radiocarbon, with full open access: Meadows, J., Rinne, C., Immel, A., Fuchs, K., Krause-Kyora, B., Drummer, C., 2020. High-precision Bayesian chronological modeling on a calibration plateau: the Niedertiefenbach gallery grave, Radiocarbon. http://dx.doi.org/10.1017/RDC.2020.76). We combine the results of a 14C dating programme with archaeogenetic, osteological and sparse stratigraphic data, to construct a Bayesian chronological model for a multi-generational sequence situated entirely on a plateau in the 14C calibration curve. Calibrated dates of individual human bones from the Late Neolithic gallery grave at Niedertiefenbach, Hesse, Germany, span the entire calibration plateau in the late 4th millennium (c.3350-3100/3000 cal BC), but our model restricts the overall period of burial to 3–6 generations centered on the later 3200s, and provides narrower absolute date ranges for specific individuals and associated events. We confirm the accuracy and robustness of this model by sensitivity tests of each of its components. Beyond providing a more dynamic narrative for the formation of the heterogenous burial population at Niedertiefenbach, our results show that calibration plateaus are suitable periods for Bayesian chronological modeling of even relatively brief sequences, provided that all the information employed is correct. Prior information constraining both the order of events, and of potential date differences between them, is essential for the model to give accurate, unimodal estimates of the dates of these events.

The Wartberg culture (WBC, 3,500-2,800 BCE) dates to the Late Neolithic period, a time of important demographic and cultural transformations in western Europe. We perform a genome-wide analysis of 42 individuals who were interred in a WBC collective burial in Niedertiefenbach, Germany (3,300-3,200 cal. BCE). Our results highlight that the Niedertiefenbach population indeed emerged at the beginning of the WBC. This farming community was genetically heterogeneous and carried a surprisingly large hunter-gatherer ancestry component (40%). We detect considerable differences in the human leukocyte antigen gene pool between contemporary Europeans and the Niedertiefenbach individuals whose immune response was primarily geared towards defending viral infections.

1940–1965 m., vykdant Varduvos upės vagos ir Ertenio ežero melioracijos darbus Šarnelės kaime, Šiaurės vakarų Lietuvoje, buvo rasta pavienių iš gyvūnų kaulų ir ragų pagamintų įrankių, datuojamų akmens amžiumi (1 pav.). 1973 ir 1981–1982 m. čia buvo atliekami archeologiniai kasinėjimai, kurių metu rasta akmens amžiaus pabaiga – bronzos amžiumi datuojama gyvenvietė su palankiomis organikos išlikimo sąlygomis. 2016 m. pradėti intensyvūs Žemaičių aukštumos akmens amžiaus paminklų ir pavienių radinių tyrimai suteikė progą detaliau panagrinėti Šarnelėje rastus pavienius kaulo ir rago radinius. Verpsto formos ornamentuoto kaulinio durklo (2 ir 3 pav.) datavimas parodė, kad jis priklauso paskutinio driaso laikotarpiui, t. y. 10 569– 10 134 cal BC (95 proc. tikimybė) (4 pav.). Šiuo metu Rytų Baltijos regione tai yra ankstyviausias ornamentuotas tokio tipo dirbinys, kuris turi medžiotojųrankiotojų mobiliojo meno apraiškų. Dirbinys iš abiejų pusių ornamentuotas susikertančių linijų motyvu, kuris suformuoja atskirus trikampius ir rombus (5 ir 6 pav.). Kol kas dar nėra nustatyta tiksli rūšis gyvūno, kuriam priklausė kaulas, tačiau stabiliųjų izotopų duomenys rodytų stambų žolėdį gyvūną, tikėtina, briedį. Chronologiniu požiūriu durklas patenka į bendrą Rytų ir pietryčių Baltijos regiono datuotų finalinio paleolito rago ir kaulo dirbinių kontekstą (7 pav.). Tikėtina, kad pagal savo amžių kaulinis durklas galėjo priklausyti Svidrų kultūros technologijai, kurios gyvenviečių yra aptinkama Vakarų Lietuvoje. Šarnelėje rastas kaulinis durklas ne tik svariai papildo menkus šiuo metu turimus Rytų Baltijos regiono vėlyvojo paleolito kaulo ir rago technologijos duomenis, bet ir suteikia žinių apie ankstyviausią šiame regione žinomą priešistorinį meną. This paper presents the latest data on a spindle-shaped decorated bone dagger, which was found as a stray find in the village of Šarnelė in northwest Lithuania, and which recently been dated to the Final Palaeolithic. It is currently the only one such example of osseous technology in Lithuania dated to this period. In 2016, we started to reinvestigate the Stone Age material from the Samogitian highland by AMS radiocarbon (14C) dating, stable isotopes, use-wear and Raman methods. AMS dating showed that the decorated dagger discovered in the surroundings of the drained Lake Ertenis and the River Varduva at Šarnelė currently is one of the oldest prehistoric art objects found in Lithuania and possibly in the eastern Baltic region as well. The dagger was also analysed by use-wear method, which helped to identify some stages of the production of the article itself and its decoration. The paper presents the first results of research of this artefact in the wider geographical and taxonomic context of the Final Palaeolithic in northern Europe.

Long-held ideas concerning early Neolithic Linearbandkeramik (LBK) settlements in central Europe have been thoroughly challenged in recent years, for example, regarding their internal organisation or the use-life of individual houses. These topics have now also been addressed with the help of large radiocarbon (14C) datasets. In the light of this discussion, we present findings of our ongoing research at Vráble in south-western Slovakia. Intensive prospection by fieldwalking, geophysics and sedimentology, complemented by targeted excavations and archaeobotanical investigations, aims to unravel social and temporal relationships between three adjacent LBK settlements. A total of 23 of the c.300 houses revealed by geophysical prospection have been dated. Bayesian chronological modelling of this dataset, comprising 109 14C ages from 104 samples, indicates that the three LBK settlements at Vráble coexisted, and that overall the LBK settlement lasted for c. 200–300 years. Our results imply a ‘short’ use-life for individual houses (median c.20–30 y), suggesting that relatively few houses were inhabited simultaneously. Our data suggest that the overall LBK population at Vráble might have increased over the course of occupation, but probably never exceeded 200–300 individuals, based on the number of houses that could have been occupied contemporaneously. We compare the Vráble evidence with Bayesian chronologies for other LBK sites, and discuss the implications of these findings for models of population agglomeration and recognising the environmental impact of early farming communities.

The Neolithic site Riņņukalns in the Lake Burtnieks/River Salaca area in northern Latvia is the only freshwater shell midden in the eastern Baltic Sea area. An excavation carried out in 2011 revealed an intact stratigraphy with alternating layers of unburnt and burnt mussel shells and yielded various kinds of archaeological finds, among them several thousand fish remains. To gain an understanding of the fish species and specimens caught by the Neolithic settlers, and to discern any temporal development in the fish species composition, we analysed fish remains from different sections and layers. Results from both the archaeozoological and stable isotope data, give evidence for a change in the relevance of fish species during the period of use, and they also provide information for reconstructing the former river and lake hydrology in the vicinity of the midden. The Stone Age landscape seems to have been very similar to the present situation, so that the study area has been an extraordinarily stable ecosyst...

A major assemblage of Mesolithic and Neolithic wooden artefacts has been recovered from the bed of the River Užava at Sise, in the coastal belt of western Latvia. New archaeological investigation has also produced wooden remains and other evidence of occupation on the riverbank. On the basis of multi-proxy environmental data and radiocarbon dating, this article offers a first attempt to place the human activity in a palaeolandscape context. The earliest evidence of human presence is provided by wooden artefacts dated to c. 10,500–9700 cal. BP, during the Ancylus Lake transgression. These remains are thought to reflect fishing activities in the shallows of the Ventspils Bay, which existed during the transgression. The regression that followed brought a return to river-valley conditions at the site, and the next recorded period of human activity, evidenced by 14C-dated antler tool finds, is associated with the beginning of the Littorina Sea transgression, culminating c. 7500 cal. BP. With the formation of a new Ventspils Bay/Lagoon, the Sise site, at or near the river mouth, would have regained its status as an advantageous fishing location. Archaeological finds indicate continued human activity c. 6000–4000 cal. BP, even though the sea level was now lower and this was no longer a river-mouth location. Such a pattern of recurrent human occupation during the early to middle Holocene, associated with repeated shifts of the shoreline, appears to be characteristic of the central region of the Baltic Sea Basin.

Aquatic food resources (fish and molluscs) were exploited intensively at Riņņukalns, a Neolithic freshwater shell midden at the outlet of Lake Burtnieks, north-eastern Latvia. Stable isotope data (δ 15 N and δ 13 C) from a rich fishbone assemblage and a wide range of terrestrial species complement published results on faunal samples from the famous prehistoric cemetery and settlement at Zvejnieki, on the same lake. Stable isotope data show that freshwater food resources made substantial but varying contributions to human diets at Zvejnieki and Riņņukalns throughout the Mesolithic and Neolithic. Our research has also shown significant radiocarbon freshwater reservoir effects (FRE) in aquatic species from Lake Burtnieks, which would presumably have affected the radiocarbon ages of prehistoric human remains, and may explain some apparent anomalies in published dates from Zvejnieki burials. We present new radiocarbon and stable isotope results from a multiple burial at Zvejnieki, of five contemporaneous individuals, whose remains are being re-examined to assess evidence of interpersonal violence. Contrary to earlier interpretations, our data show that differences between individuals in the amount of fish consumed would account for the 300-year spread in their radiocarbon ages, given the isotope data and our estimate of the effective FRE in local fish. Our FRE-corrected calibrated dates for these five individuals are therefore compatible with a single burial date. We propose that these models can be used to correct the calibrated radiocarbon ages of other Zvejnieki burials for dietary FRE, provided that the individuals concerned consumed mainly local resources. The same methodology can also be applied elsewhere, as long as local isotopic and FRE values are well understood, and values for terrestrial and aquatic species are sufficiently different.

Pottery produced by mobile hunter-gatherer-fisher groups in the northeast European forest zone is among the earliest in Europe. Absolute chronologies, however, are still subject to debate due to a general lack of reliable contextual information. Direct radiocarbon dating of carbonized surface residues (“foodcrusts”) on pots can help to address this problem, as it dates the use of the pottery. If a pot was used to cook fish or other aquatic species, however, carbon in the crust may have been depleted in 14C compared to carbon in terrestrial foods and thus appear older than it really is (i.e. showing a “freshwater reservoir effect,” or FRE). A connected problem, therefore, is the importance of aquatic resources in the subsistence economy, and whether pots were used to process aquatic food. To build better chronologies from foodcrust dates, we need to determine which 14C results are more or less likely to be subject to FRE, i.e. to distinguish crusts derived mainly from aquatic ingredients from those composed mainly of terrestrial foods. Integrating laboratory analyses with relative chronologies based on typology and stratigraphy can help to assess the extent of FRE in foodcrust dates. This article reports new 14C and stable isotope measurements on foodcrusts from six Stone Age sites in central and northern European Russia, and one in southeastern Estonia. Most of these 14C results are not obviously influenced by FRE, but the isotopic data suggest an increasing use of aquatic products over the course of the 6th and 5th millennia cal BC.

Evidence of a rapid increase in atmospheric radiocarbon ( 14 C) content in AD 774–775 was presented by Miyake et al. (2012), who observed an increase of about 12‰ in the 14 C content in annual tree rings from Japanese cedar. Usoskin et al. (2013) report a similar 14 C spike in German oak, and attribute it to exceptional solar activity. If this phenomenon is global in character, such rapid changes in 14 C concentration may affect the accuracy of calibrated dates, as the existing calibration curve is composed mainly of decadal samples. Single-year samples of dendro-chronologically dated tree rings of deciduous oak ( Quercus robur ) from Kujawy, a village near Krakow (SE Poland), spanning the years AD 765–796, were collected and their 14 C content was measured using the AMS system in the Leibniz Laboratory. The results clearly show a rapid increase of 9.2 ± 2.1‰ in the 14 C concentration in tree rings between AD 774 and AD 775, with maximum Δ 14 C = 4.1 ± 2.3‰ noted in AD 776.

Zamostje 2, on the Dubna River, c.100km north of Moscow, appears to offer an ideal opportunity to understand the relative and absolute chronology of Upper Volga Early Neolithic pottery. More than 100 radiocarbon (14C) dates are available from a stratigraphic sequence which spans from the Late Mesolithic to the Middle Neolithic. All typological stages are represented among over 18,000 sherds of Early Neolithic pottery, and many of these sherds bear deposits of carbonised food remains (food-crusts), which can be dated directly by 14C; more than 30 food-crusts have been dated directly. Nevertheless, there remains considerable uncertainty about the date range of Upper Volga pottery at Zamostje 2, and many of the issues raised are relevant to dating early pottery at other sites. Moreover, the absolute chronology of Upper Volga pottery must have some bearing on the interpretation of 14C dates for pottery from adjoining regions. In this paper, we discuss alternative interpretations of the Zamostje 2 evidence.

In this paper I consider the relationship between the spatial properties of visual perceptual experience and the sense-datum inference. I argue that the sense datum inference should be accepted if spatial properties are not merely intentionally present in such experiences. This result serves to underline the seriousness of the difficulties that are presented to direct realism by a particular class of illusory spatial experiences based on the geometry of visual perceptual experience. In light of these considerations I argue that it is a constraint on direct realism that the underlying spatial character of visual perceptual experiences must be the same as that of the physical world.

Four inhumations from Kivisaare and Riigikula I settlement and burial sites were dated in the course of a project about hunter-gatherer mortuary practices in Estonia, as they were believed to belong to the Stone Age. However, these burials appear to be Early Bronze Age inhumations instead, and thus are discussed separately in the present article. These burials are the first evidence in Estonia of a long-lasting tradition of inhumations without any visible aboveground structures. As the archaeology of the Early Bronze Age in Estonia is poorly known, these four inhumations contribute immensely to our understanding about this time period. Moreover, stable isotope values show that these people had a more terrestrial subsistence strategy than Stone Age hunter-gatherers. Nevertheless, aquatic resources were probably still significant components of their diet, particularly at Kivisaare, and the radiocarbon dates could therefore be subject to significant freshwater reservoir effects. This creates ambiguity in the chronological relationship of these four individuals to burials in stone-cist graves, which are attributed to the Late Bronze Age and which appear to be associated with fully agricultural communities. DOI: 10.2458/azu_rc.57.18459

The logic of using summed radiocarbon (14C) calibrations (cumulative probability density functions for large numbers of calibrated 14C dates) as proxies for past populations rests on the presumption of a proportional relationship between population size and the production, and subsequent preservation, recovery, and analysis, of 14C-datable material. Critiques of this approach have generally focused on the various problems that may undermine the validity of this assumption. Here, instead, we presume a perfect correspondence between population size and the quantity of datable material produced at any given time, and explore the question of how well summed 14C calibrations can track demographic changes under such ideal circumstances. We introduce a method of generating a random sample of simulated 14C determinations, from a specified distribution, with variable data densities and measurement errors. In other words, we generate a random sample of 14C dates not from an ideal statistical distribution but rather using a defined population curve to determine the probability distribution from which the calendar dates of the simulated 14C samples are drawn. We generate simulated 14C ages for these samples, calibrate them, and sum those calibrations. We compare the resulting proxy population curve to the known population distribution from which it was generated, to see whether known population fluctuations are unambiguously visible on a proxy curve derived from 14C data sets that are realistic in terms of the number and precision of the 14C determinations included. Results highlight 1) the critical role played by the magnitude and duration of any population fluctuation, and 2) the importance of sample size, and the reality that the numbers of samples required to detect significant population changes are generally far higher than those available to researchers proposing demographic reconstructions on the basis of literature searches for radiocarbon dates. We conclude that even if archaeological 14C data sets could be corrected for taphonomic filters and research biases, demographic signals would be difficult to distinguish from statistical noise in summed probability distributions. We suggest that simulation studies should be integral components of any attempt to reconstruct prehistoric demography from 14C dates.

International audience; The controlled complex coacervation of oppositely charged hyaluronic acid (Mw ≈ 800-1000 kg.mol-1) and chitosan (Mw ≈ 160 kg.mol-1 , degree of acetylation = 15 %) led to hydrogels with controllable properties in terms of elasticity and strength. In this work, we performed desalting by dialysis of high ionic strength solutions of mixed polyelectrolytes and showed that the control of the pH during the polyelectrolyte assembly greatly impacts the mechanical properties of the hydrogel. First, for pHs from 5.5 to 7.5, a slight coacervation was observed due to low chitosan protonation and poor polyelectrolyte associations. Then, for pHs from 3.0 to 5.5, coacervation and syneresis led to free-standing and easy to handle hydrogels. Finally, for pHs from 2.0 to 3.0 (close to the pKa of the hyaluronic acid), we observed the unusual stretchability of these hydrogels that could arise from the pre-folding of hyaluronic acid chains while physical crosslinking was achieved by hyaluronic acid/chitosan polyelectrolyte complexation.

This paper gives a systematized overview of different Narva stage sites in Estonia, describing their artefactual and archaeozoological material, and environmental conditions. We demonstrate the diversity of Narva stage settlement types (sites on coastal river estuaries, coast, coastal lagoons, inland river banks and shores of inland lakes) and economy (marine, terrestrial/inland aquatic and mixed subsistence) in the region. A further site-based description of Narva pottery is also provided in order to exemplify the similarities and differences of this earliest pottery type in the eastern Baltic. We also present a comprehensive list of all currently available Narva stage radiocarbon dates from Estonia and Ingermanland (north-western Russia) according to which the Narva-type pottery in the northern part of its distribution area dates to the period c. 5200-3900 cal BC. Additionally, the issues of dating food crust, especially the high risk of reservoir effect offsets, are emphasized. We carried out a comparative study dating contemporaneous food crusts and plant remains and conducting lipid residue analysis employing combined methods of gas chromatography-mass spectrometry (GC-MS) and isotope ratio mass spectrometry (GC-C-IRMS, EA-IRMS). The results demonstrate the implications and importance of characterizing lipid residues so that samples with reservoir correction can at least be identified. Introduction The beginning of pottery use is a substantial and important innovation in the history of humankind. It must have brought along a new concept not only for storage and cooking, but also changes in technology and production skills, transport and trading. The earliest pottery known to date is from eastern Asia (China, Japan and Russian Far East and eastern Siberia) and goes back to the end of the Pleistocene (e.g. Nakamura et al. 2001; Kuzmin 2006; Boaretto et al. 2009; Shevkomud & Yanshina 2012, 53). In the Baltic Sea region pottery first appears, depending on traditions of archaeological periodization, in the Early Neolithic (Finland, Russia, Latvia, Lithuania, Belarus) or Late Mesolithic period (Sweden, Denmark, Germany, Poland, Estonia) (e.g. Loze & Lijva 1989; Girininkas 2005, 105 f.; Kriiska 2009, fig. 5; Piezonka 2012, 24). Earlier in Estonia the introduction of pottery was assigned to the Neolithic period, as with other Baltic States (e.g. Jaanits et al. 1982, 61; Lang & Kriiska 2001, 89). Since the adoption of pottery generated no significant change in the local settlement pattern, subsistence economy nor, presumably, in social organization, the new periodization of the Stone Age in Estonia proceeds from the process of the introduction of domesticates. The latter occurred more than a thousand years after the adoption of pottery and resulted in major shifts in the society, settlement and economy in both Estonia and neighbouring areas (Kriiska 2009, 167; Nordqvist et al. 2015, 143). Two major pottery traditions, divided into many sub-variants, can be distinguished in the Baltic Sea region. One of the traditions embraces pottery types that comprise large pointed- or rounded-bottomed pots and, in places, also small and shallow saucer-shaped vessels (see e.g. Hallgren 2004, fig. 1). The know-how of making such vessels spread from the late 6th millennium through the early 5th millennium cal BC (e.g. Loze 1988, 101; Hallgren 2004, 136 f.; Piezonka 2008, 76; 2012, 42; Girininkas 2009, 127; Kriiska 2009, 161; Jennbert 2011, 99; Pesonen et al. 2012). Five types of early pottery are traditionally distinguished in the Baltic Sea region: (1) Ertebolle in southern Scandinavia, northern Germany and northern Poland (e.g. Hallgren 2004, 135; Jennbert 2011); (2) Early comb ware (or Sperrings) in southern Finland and north-western Russia (e.g. Luho 1957; German 2002); (3) Saraisniemi 1 in northern Finland and in Karelia, the Kola Peninsula in Russia and northern Sweden (e.g. Torvinen 2000; Haggren et al. …

Stable isotope analysis represents the principal scientific technique used in the reconstruction of ancient human diet. Characterisation of human diet requires that the isotopic baseline is established, i.e. the isotopic signals of consumed food groups. However, cooking may alter the bulk isotopic signal of food groups through the selective loss of macronutrients or biochemical components with different isotopic signals. In this study, we investigate the influence of cooking on the stable isotope values of raw flesh of two fish species (mackerel, with a high fat content, and haddock, having a low fat content) using three potential prehistoric cooking methods. The fish were boiled in a pot, grilled beside an open fire, and steamed in hot sand. Cooking times and temperatures were monitored. Stable isotope ratios (delta C-13 and delta N-15) were measured on multiple fractions (bulk flesh, lipids, lipid-extracted flesh, water-extracted flesh, water-soluble compounds, and fish-bone collagen) before and after cooking. The results show that, for some fractions, cooking modified the composition, but changes in isotopic values relative to raw fish were in general

The prehistoric shell middens of Atlantic Europe consist of marine molluscs, but the eastern Baltic did not have exploitable marine species. Here the sole recorded shell midden, at Riņņukalns in Latvia, is on an inland lake and is formed of massive dumps of freshwater shells. Recent excavations indicate that they are the product of a small number of seasonal events during the later fourth millennium BC. The thickness of the shell deposits suggests that this was a special multi-purpose residential site visited for seasonal aggregations by pottery-using hunter-gatherer communities on the northern margin of Neolithic Europe.

An Iron Age timber settlement which, in view of the defensive structures uncovered, is described as a lake fortress, on an island in Lake Āraiši, north-eastern Latvia, was excavated in 1965–69 and 1975–79 by teams led by Jānis Apals, who distinguished five construction phases. Dendrochronological analysis produced a c. 100-year floating chronology for Norway spruce (Picea abies (L.) Karst.) timbers from the earliest phase. A 14C wiggle-match was undertaken to obtain an absolute date range for the final year of the floating chronology, and thus for the construction of the settlement. Ten blocks of wood from one timber, each comprising 6-11 years and collectively spanning the whole 93-year tree-ring series, were dated by AMS. Using the IntCal13 calibration data, there is a 95% probability that the felling date of this timber falls in the range 775–784 cal AD. It appears, however, that the AD 775 spike in the atmospheric 14C level occurred within the 6-year span of the last sample. On this basis, we can narrow the date of construction to 776–780 cal AD. This date is significantly earlier than those reported in previous publications.

This paper outlines the results of a programme of radiocarbon dating and Bayesian modelling relating to an Early Bronze Age barrow cemetery at Over, Cambridgeshire. In total, 43 dates were obtained, enabling the first high-resolution independent chronology (relating to both burial and architectural events) to be constructed for a site of this kind. The results suggest that the three main turf-mound barrows were probably constructed and used successively rather than simultaneously, that the shift from inhumation to cremation seen on the site was not a straightforward progression, and that the four main ‘types’ of cremation burial in evidence were used throughout the life of the site. Overall, variability in terms of burial practice appears to have been a key feature of the site. The paper also considers the light that the fine-grained chronology developed can shed on recent much wider discussions of memory and time within Early Bronze Age barrows

Small community-based biomass energy systems sourcing feedstocks from local small-scale forests are common in the northern hemisphere but are few in Australia. Fine-grained analyses of feedstock availability are an important precursor to increased investment in these systems in Australia. This study presents estimates of the potential biomass for energy supply from hardwood plantations within the Sunshine Coast Council region of southeast Queensland. The region’s 1,120 ha of private farm forestry, corporate-owned and joint venture hardwood plantations are predominantly small-scale (

Two floating tree-ring chronologies were developed from oak timbers recovered during salvage excavations of a pre-Roman wharf in Este, a prominent center of the Veneti people, who lived in northeastern Italy during the Iron Age. Wiggle-match radiocarbon dating shows that one chronology spans the 10th and 9th centuries cal BC, and that the waterfront was probably built ∼800 cal BC. The second chronology apparently spans most of the 7th century cal BC, and is associated with a phase of construction about 2 centuries after the first. One of the samples gave what appeared to be anomalous 14C results that may best be explained as evidence of a short-term fluctuation in atmospheric 14C level, which can be seen in short-lived samples but is not apparent in the decadal or bidecadal calibration data. Both chronologies cover periods for which there are no other tree-ring chronologies in this region, and could become key to refining the local Iron Age chronology.

Riņņukalns is the only known prehistoric shell midden in the eastern Baltic, and is one of the few middens in northern Europe consisting mainly of freshwater mussel shells. Situated on the Salaca River at the outlet of Lake Burtnieks, in northeastern Latvia, the site was originally excavated in the 1870s, and reinvestigated several times over the following decades. A new excavation in 2011 showed that part of the midden remained intact. The new exposure, dated to the later 4th millennium cal BC, yielded rich fishbone and mollusk shell assemblages, herbivore, human and bird bones, and a wide range of artifacts typical of a subsistence economy based on fishing, hunting, and gathering. Human remains from burials excavated in the 1870s were also located in archives. The co-occurrence at Riņņukalns of human remains with a broad range of terrestrial and aquatic food remains provides an ideal setting to study freshwater reservoir effects and other isotopic signals of diet and mobility. The extent of 14C depletion in local freshwater resources is an essential parameter for such studies; on the basis of 14C ages of modern and paleoenvironmental samples, we estimate that the applicable reservoir age in Lake Burtnieks is in the order of 800–900 14C yr.

This study explores Australian small-scale rural lifestyle landowners’ perceptions of and experiences with natural resource management (NRM) extension and incentive programmes and discusses means to better-match such programmes to these landowners’ NRM interests, assistance needs and delivery preferences. Data was collected from seventeen in-depth qualitative case-studies of small-acreage landholders located in the Noosa hinterland in south-east Queensland. These landholders indicated a high need for expert advice, labour and other resource assistance to achieve their property management objectives. They had, however, a low-level of awareness and understanding of available programmes (particularly incentive schemes) that could provide some of their needed support. Other key barriers to the landholders’ participation in these programmes were aversions to support providers, a perceived unsuitability of properties or irrelevance of particular incentive programmes, and concerns about programme application procedures or property-rights and value-related implications of engagement. Increased NRM engagement among small-scale lifestyle landowners may be achievable through amendments to existing support programmes and better communication of these programmes. The design and delivery of appropriate measures and messages may require collaborative partnerships, with knowledgeable and influential ‘go-to’ landowners and peer-mentoring networks playing a critical role. In many cases, conservation-focused incentive programmes may need to facilitate cooperative NRM among groups of adjoining micro-scale lifestyle landowners and allow greater flexibility in the length and allowable land and forest management practices of contractual agreements. Moreover, small-scale lifestyle landowners have much interest in and need for support to integrate multi-purpose agroforestry systems with other environmental and aesthetic property management goals. Workshops, follow-up field-days on participating properties, free one-on-one on-property advice, and NRM guides that include detailed case-study accounts of landowner experiences are important means of communicating the availability, administrative requirements and benefits of support programmes to small-scale lifestyle landowners.

Over 3000 prehistoric bone and antler artifacts, collected in the late 1930s from the former lakebed of Lake Lubāns, are held by the National History Museum of Latvia. This collection is remarkable not only as one of the largest known assemblages of bone implements in northern Europe, but also in terms of diversity of forms. The most elaborately worked objects include harpoons, often with two rows of barbs and spade-shaped bases, which are believed to date to the Late Paleolithic, and to be among the oldest organic artifacts ever found in Latvia. Four broken specimens were sampled in 2011 for accelerator mass spectrometry (AMS) dating, stable isotope analysis, and taxonomic attribution by ZooMS. The results support the interpretation that these artifacts were made from large cervid bones, and date all four objects to the early Preboreal (mid-10th millennium cal BC). The Lake Lubāns harpoons therefore fall in the same period as similar harpoons from Denmark, northern Germany, and Poland, although only a handful of these have been dated directly. DOI: 10.2458/56.16957

Extractives industries are increasingly operating on Indigenous Peoples’ territories and can have profound environmental and socio-cultural (including human rights) impacts for these and other stakeholders. Sustainability standards (i.e. best-practice operational procedures, including sector-specific certification programs) have emerged to mitigate these impacts and improve the benefits for impacted communities. Best-practice design, implementation and verification of sustainability standards underpinning certification programs requires active participation by Indigenous Peoples. This study uses literature review and a survey of key informants to both map the literature relevant to the participation of Indigenous Peoples in extractives industry certification programs and standards, and to highlight best-practices in program governance and assurance processes. There is little literature on Indigenous Peoples’ participation in certification program governance and assurance processes. The literature is dominated by reporting on the environmental and socio-cultural impacts of extractives developments for Indigenous Peoples, and associated conflicts and negotiations/agreements to achieve equitable and sustainable development outcomes consistent with international norms. In this context, there is an increasing focus on Indigenous Peoples’ ‘Free, Prior & Informed Consent’ (FPIC). Key informants identified few best-practice examples of Indigenous Peoples’ participation in sustainability standards for extractives. Most emphasised the importance of Indigenous Peoples’ FPIC in project development, operation and completion. Discussions also highlighted limitations of standard assurance processes and the potential for simple but innovatively-applied digital technologies to support Indigenous Peoples’ participation in data collection for auditing. A key concern for Indigenous communities impacted by extractives developments is effective rehabilitation of their biocultural landscapes, incorporating environmental values, cultural traditions (i.e. obligations and practices) and provision for sustainable livelihoods. The study’s findings provide guidance for certification program managers, extractives operators and auditors to improve engagement of Indigenous Peoples in certification program governance and assurance processes.

A commentary discussing topics broached in ‘ Forest recovery in an Australian amenity landscape: Implications for biodiversity conservation on small-acreage properties’ ( Meadows et al., 2018 ).

One of the most exciting fields in current radiocarbon research is the study of aquatic radiocarbon reservoir effects (RREs). Potential RREs pose a challenge when chronologies are based on 14 C dating of food or human remains, providing an impetus for new and improved efforts to detect and quantify RREs in archaeological materials. Examples of such developments include compound-specific isotopic and 14 C analysis, and novel statistical methods to reconstruct ancient diets. Awareness of RREs has also created new research opportunities; in particular, radiocarbon is increasingly being employed as an environmental and dietary tracer in ecological and archaeological studies, requiring a better understanding of the spatial and temporal variability of aquatic RREs.

THIS REPORT PRESENTS the results of analyses carried out following the discovery and excavation of a medieval pottery kiln in Pontefract, a discovery which featured in the ‘Fieldwork Highlights’ section of Medieval Archaeology 53 (2009). The kiln is remarkable for having produced vessels previously only associated with the Stamford ware industry of the late 11th and 12th centuries and demonstrates the existence of at least one northern production site, the likely existence of which was first mooted in the 1950s. As both radiocarbon and archaeomagnetic dating methods indicate a last firing of the Pontefract kiln in the late pre-Conquest period, the discovery also poses questions about the chronology of Stamford ware production.

Effective landscape-level biodiversity conservation requires cooperative forest management across public and private-tenure boundaries. This study explores the potential for cooperative cross-boundary forest management among small-acreage lifestyle landholders in southeast Queensland using 17 in-depth qualitative case-study analyses. Landholders typically possessed mutual objectives concerning forest management, a sense of neighborly stewardship, and positive predispositions toward cooperative cross-boundary forest management. However, capacity, institutional, and neighbor-related barriers were limiting landholder interest and involvement. We find that peer-mentoring networks have a critical role to play in promoting and delivering programs that support cross-boundary forest management. Government should ideally play a background “out-of-sight” facilitator role. We also find the capacity for urbanizing rural landscapes to retain their natural values can be greatly enhanced by facilitating small-acreage la...

The dynamic rheology of aqueous solutions of konjac glucomannan has been evaluated over a range of concentrations up to 2.35%, and the effect of borate cross-linking of such solutions evaluated in the range 0.02-40 mM borate. In preliminary work, conventional parallel plate geometries were employed and in situ cross-linking was investigated. For borate cross-linked samples a superior method, however, was found to be measurement of pre-formed cores of cross-linked polymer into which a four-bladed vane geometry was introduced. In order to compare with other associating polymer systems, rheological data were analysed by defining plateau moduli, corresponding relaxation times and zero shear viscosities and the scaling behaviour of these parameters with polymer and cross-linker concentrations was established. Maxwell fits and time-concentration superposition procedures were investigated. The rheological properties of the cross-linked polymer were shown to be the result of both increased network connectivity and retarded network dynamics.

The interaction of native xanthan gum, deacetylated xanthan gum and depyruvated xanthan gum with konjac glucomannan has been studied using DSC and controlled stress rheometry. In the absence of electrolyte the DSC cooling curves for native xanthan and deacetylated xanthan showed a single peak and there was a corresponding sharp increase in the storage modulus indicating gel formation. It is apparent that on cooling, association of the konjac glucomannan with the native xanthan molecules is triggered by the xanthan coil-helix transition. In the presence of electrolyte, there were two DSC peaks observed. The higher temperature DSC peak was attributed to the xanthan coil-helix transition while the lower temperature DSC peak was attributed to konjac glucomannan – xanthan association as noted by an increase in the storage modulus. The gels formed were much weaker than those in the absence of electrolyte. The DSC cooling curves for depyruvated xanthan in the absence of electrolyte showed two peaks. The higher temperature peak was attributed to the coil-helix transition while the lower temperature peak corresponded to gelation as noted by an increase in the storage modulus. The gels were very much weaker than for native xanthan gum and deacetylated xanthan gum.

Tree-ring samples were taken from a from a pine tree (Pinus pinea) growing in Villar de Peralonso, a rural area 50 km west of the city of Salamanca, Spain. All samples were processed to extract α-cellulose and the radiocarbon concentration in each annual ring was measured using accelerator mass spectrometry (AMS) at the University of Nagoya, Japan. The data set covers a growth period between 1979 and 2006, and represents the concentrations of 14C in a “clean area.” The average difference between 14C concentrations in Villar de Peralonso and NH zone 1 for the period 1979–1999 is 4.1 ± 1.3%. A sample was taken to obtain the reference level of 14C for the Iberian Peninsula, for a study of anthropogenic emission of CO2 in urban areas. As part of the initial study, 14C concentration data in tree rings from the city of Valladolid were used to recalculate the fossil fuel component (cfoss) using reference data from Villar de Peralonso.

In 2004, the courtyard of Ca’ Foscari University, Venice, was excavated in advance of building work, revealing an unbroken sequence of archaeological deposits. The earliest layers consisted of redeposited natural sediment, packed into wattle structures, a system of land reclamation first described by Cassiodorus in AD 537–8, and now known from several other sites in the city. The ground level was built up and extended several times with successive wattle structures, before the eventual construction of a stone waterfront. We have used Bayesian modeling of dendrochronological, radiocarbon, and stratigraphic dating evidence to obtain a precise chronology for the earliest phases of occupation, and to compare it to the chronology of land reclamation at similar sites elsewhere in Venice. DOI: 10.2458/azu_js_rc.v54i3–4.16149

Seventeen of the 73 individuals buried in the Early Bronze Age (EBA) cemetery at Arano di Cellore di Illasi, near Verona, northern Italy, were radiocarbon dated by accelerator mass spectrometry (AMS). Bayesian modeling of the calibrated dates suggests that the cemetery was probably used over several generations mainly within the first 2 centuries of the 2nd millennium cal BC. Burial activity was therefore mainly restricted to within the EBA I B/EBA I C of the north Italian Bronze Age chronology. An isolated burial, found ~90 m northwest of the cemetery, may date to the same period. DOI: 10.2458/azu_js_rc.v54i3–4.16171

A programme of archaeological investigation took place on Fin Cop hillfort, in the Derbyshire Peak District, during the summers of 2009 and 2010. In total fifty test-pits and eight trenches were excavated, revealing evidence for a Mesolithic quarry site, and sporadic evidence for Neolithic and Beaker period activity. An assemblage of Late Bronze Age-Early Iron Age ceramics was recovered from the interior of the fort in association with rock-cut pits testifying to occupation of the hilltop prior to the construction of the hillfort rampart. The hillfort rampart construction took place in the period 435–390 cal. BC (68% probability) and was destroyed before its completion, probably by the mid-fourth century cal. BC, when large numbers of women and children were disposed of in the ditch together with the demolition material from the fort's wall. The defensive character of the monument and the evidence for a violent end to the site appear to indicate, on current evidence, that the fort was sacked.

In this paper I argue that holes are not objects, but should instead be construed as properties or relations. The argument proceeds by first establishing a claim about angles: that angles are not objects, but properties or relations. It is then argued that holes and angles belong to the same category, on the grounds that they share distinctive existence and identity conditions. This provides an argument in favour of categorizing holes as one categorizes angles. I then argue that a commitment to the existence of properties to be identified with holes provides sufficient resources to account for true claims about holes. © 2011 Springer Science+Business Media B.V.

This short report describes a human skeleton from an archaeological site in England showing signs of treponemal disease. A radiocarbon determination indicates that it is firmly pre-Columbian in date. The implications for recent debates concerning the origin of treponemal disease in Europe are discussed. Copyright © 2010 John Wiley & Sons, Ltd.

The onset of the Neolithic period in the Russian North is defined by the emergence of pottery vessels in the archaeological record. The ceramics produced by mobile hunter-gatherer-fisher groups in the north-eastern European forest zone are among the earliest in Europe, starting around 6000 cal BC. After the initial mosaic of local styles in the Early Neolithic, including sparsely decorated wares and early Comb Ware, the Middle Neolithic period, starting in the 5th millennium cal BC, saw the development and spread of larger, more homogenous typological entities between the Urals and the Baltic, the Comb-Pit and Pit-Comb wares. Absolute chronologies, however, are still subject to debate, due to a general lack of reliable contextual information. Direct 14C dating of carbonised surface residues (‘food crusts’) on pots can help to address this problem, as it dates the use of the pottery; but if aquatic foods were processed in the vessels, the respective radiocarbon ages can appear to be too old due to the freshwater reservoir effect. In this pa­per, we discuss the radiocarbon chronologies of four important stratified archaeological complexes in the region between Lake Onega and the Sukhona basin, Berezovaya Slobodka, Veksa, Karavaikha, and Tudo­zero. A growing series of dates, including AMS dates, sheds new light on the onset and further periodisation of the Early and Middle Neolithic in this important area between Eastern Fennoscandia, Central Rus­sia and the Far North-East of Europe, although problems concerning the absolute chronology of the initial Neolithic remain.