Estimation of soil erosion on cultivated fields on the hilly Meghalaya Plateau,North-East India

The estimation of soil erosion rates in complex subtropical agricultural systems of hilly environment is difficult and most of the traditional methods have serious limitations. The ¹³⁷Cs technique allows to obtain relatively quickly retrospective medium term soil erosion results. The objective of this study was using ¹³⁷Cs approach to quantify soil loss under agricultural system which develops under growing human pressure on the hilly terrain of the Meghalaya Plateau. The measured values of caesium inventory for all sampling points are between 2% and 63% of the reference value of caesium inventory. The estimated annual soil loss for sampling points located on the slope are between 29 and 79 Mg·ha⁻¹·yr⁻¹ in the case of an improved mass balance model. It means that soil erosion in this manually tilled agricultural area cannot be neglected.     

Upper Cretaceous volcanoclastic deposits from the Haţeg basin,south Carpathians (Romania): K-Ar ages and intrabasinal correlation

In order to constrain the age of the Upper Cretaceous continental Densuş-Ciula Formation from the Haţeg basin, South Carpathians, and correlate it with the other continental unit that occurs in the region, the Sanpetru Formation, we separated and dated by the K-Ar method biotites and amphiboles from volcanoclastic deposits. The mineral phases analysed are from two tuff layers and volcanic bombs cropping out near Rachitova village. Two tuff layers from the Densuş-Ciula Formation give early Maastrichtian ages of 69.8±1.3 and 71.3±1.6 Ma, respectively. The ages determined for the tuff layers constrain the age of deposition for the Densuş-Ciula Formation and enable further correlations with the available palaeomagnetic data from the deposits occurring along the Sibişel Valley that belong to the Sanpetru Formation. The volcanic bombs collected near to Răchitova village are andesites and dacites. The age determined by K-Ar method on hornblende separated from a volcanic bomb is 82.7±1.5 Ma, which is older than the underlying Campanian marine deposits in turbidite facies. This suggests that the volcanic bombs were re-deposited during the early Maastrichtian. Thus, the volcanics found at Răchitova have at least two origins: one type is related to an explosive synsedimentary volcanic activity, and the other type is represented by older andesitic/dacitic bombs, which most probably originate from a volcanic centre situated in the Haţeg region.     

Radiocarbon dating of the bronze age bone pins from Eurasian steppe

Bone catapult and hammer-headed pins played one of very specific roles in funerary offerings in the Bronze Age graves uncovered in the Eurasian Steppes and the North Caucasus. Scholars used different types of pins as key grave offerings for numerous chronological models. For the first time eight pins have been radiocarbon dated. ¹⁴C dating of bone pins identified the catapult type pin as the earliest one. They marked the period of the Yamnaya culture formation. Then Yamnaya population produced hammer-headed pins which became very popular in other cultural environments and spread very quickly across the Steppe and the Caucasus during 2900–2650 cal BC. But according to radiocarbon dating bone pins almost disappeared after 2600 cal BC.     

Geochronology of vegetation stages of south-east Baltic coast (Kaliningrad region) during the middle and Late Holocene

The raised bog sediments that have been continuously accumulated over time represent the most suitable natural object which enables us to reconstruct Late Glacial and Holocene vegetation and palaeoclimates. Bog peat consists of organic carbon formed in situ. It contains moss, plant fragments and microfossils that are necessary for the study of palaeovegetation and palaeoclimate. However, a successful study of palaeoenvironment can be carried out on the basis of investigation of a great quantity of samples along the whole peatbog thickness. In the present paper, the authors present the results of palynological, botanical investigations and radiocarbon dating of 31 peat samples taken from the raised bog Velikoye, located in the eastern part of Kaliningrad Region. The data obtained have enabled us to reconstruct the palaeovegetation, reveal the evolution of the bog and determine rate of peat formation at different evolutional stages over the last 7500 cal BP.     

Colonial Encounters,European Kettles,and the Magic of Mimesis in the Late Sixteenth and Early Seventeenth Century Indigenous Northeast and Great Lakes

Copper kettles, in high demand among indigenous communities of the Northeast/Great Lakes, became prominent items in the exchange repertoires of early Basque, French and Dutch traders. Kettles’ origin with these “Others” and its connection to a medium (copper) that had held symbolic significance for millennia led them to be used in an indigenous ‘metaphorical’ value regime influencing trade during the late sixteenth/early seventeenth century. An artisan living on the threshold of colonial encounter in Northern Michigan between 1470 and 1660 CE—having seen European goods but not having access to them—harnessed the mimetic faculty to make a small, miniature, ceramic imitation or skeuomorph of a European trade kettle. Rather than the sincerest form of flattery, I suggest this imitation was made to acquire the power of the original to fend off the colonial danger and to connect to this symbolic value regime. I suggest the “magic” of mimesis offered personal and organizational power in the indigenous Northeast/Great Lakes during early contact. This specific case speaks more broadly to how mimesis can provide a robust framework for exploring the material cultures of colonial encounter.     

Investigating the resetting of OSL signals in rock surfaces

There are many examples of buried rock surfaces whose age is of interest to geologists and archaeologists. Luminescence dating is a potential method which can be applied to dating such surfaces; as part of a research project which aims to develop such an approach, the degree of resetting of OSL signals in grains and slices from five different cobbles/boulders collected from a modern beach is investigated. All the rock surfaces are presumed to have been exposed to daylight for a prolonged period of time (weeks to years). Feldspar was identified as the preferred dosimeter because quartz extracts were insensitive. Dose recovery tests using solar simulator and IR diodes on both K-feldspar grains and solid slices taken from the inner parts of the rocks are discussed. Preheat plateau results using surface grains and slices show that significant thermal transfer in naturally bleached samples can be avoided by keeping preheat temperatures low. Equivalent doses from surface K-feldspar grains were highly scattered and much larger than expected (0.02 Gy to >100 Gy), while solid surface slices gave more reproducible small doses (mean = 0.17±0.02 Gy, n = 32). Neither crushing nor partial bleaching were found to be responsible for the large scattered doses from grains, nor did the inevitable contribution from Na-feldspar to the signal from solid slices explain the improved reproducibility in the slices. By modelling the increase of luminescence signal with distance into the rock surface, attenuation factors were derived for two samples. These indicate that, for instance, bleaching at a depth of 2 mm into these samples occurs at about ∼28% of the rate at the surface. We conclude that it should be possible to derive meaningful burial doses of >1 Gy from such cobbles; younger samples would probably require a correction for incomplete bleaching.     

Studying Pleistocene Neanderthal and cave hyena Dietary Habits: Combining Isotopic and Archaeozoological Analyses

Stable isotope analysis is increasingly used to gain insight in the configuration of Pleistocene ecosystems. The application of isotope analysis to Neanderthal and cave hyena bone assemblages has led to hypotheses about the niche differentiation between these species. Comparing isotopic data with archaeozoology analyses shows discrepancies between the results of both analytical methods. Here, the results of all northwest European stable isotope studies on Neanderthals are reviewed. The emphasis of the analysis is on a sample of sites from MIS 4-3 in southwest France. Causes of the discrepancy between archaeozoological and stable isotope results are discussed and hypotheses reconciling the data are proposed. Recommendations for further research will allow testing of the hypotheses and increase our understanding of the functioning of Pleistocene ecosystems.     

Mortality,Money, and Commemoration: Social and Economic Factors in Southern California Grave-Marker Change During the Nineteenth and Twentieth Centuries

Social and economic factors significantly influenced grave-marker choice in southern California cemeteries during the nineteenth and twentieth centuries. Gradual changes in the American way of death since Victorian times underwent punctuated shifts in mortuary attitudes, commemoration practices, and funerary materials following moments of extreme social and economic duress. While the form of gravestones slowly evolved from large monuments to smaller flush markers during the late 1800s and early 1900s, they collectively experienced a pronounced shift during the 1920s, reflecting American responses to the devastating human losses of World War I and the 1918–19 influenza pandemic. Financial conditions directly affected decisions regarding those materials selected to mark the deceased as well. Although overall trends reveal that granite gravestones gradually replaced marble as the marker of choice in the late nineteenth and early twentieth centuries, pronounced fiscal struggles during the 1907 Bankers’ Panic and the Great Depression were evinced in distinct surges in less expensive marble and metal grave markers.