Deglaciation and Colonization: Pioneer Settlements in Northern Fennoscandia

We present new data on Early Mesolithic settlements in northern Sweden and discuss the process of pioneer colonization. A new set of radiocarbon dates from archaeological sites push deglaciation of northern Fennoscandia further back in time and demonstrate the rapid arrival of pioneer settlers. Environmental data reveal a highly productive early postglacial setting with plant communities unmatched in present ecosystems. The chronological and technological setting supports immigration from the north and northwest with pioneers relying on a long history of enculturating northern subarctic landscapes.     

Fallout 137Cs and natural 40K as tracers of topsoil development during slope processes — a case study from the Daugai environs, Southern Lithuania

Investigations of soil erosion by ¹³⁷Cs method brings uncertainties of different nature. The estimation of the ¹³⁷Cs local inventory is associated with problems of data comparison and instrumental errors. In order to avoid systematic errors, the rate of soil erosion determined by the ¹³⁷Cs method is compared with the values obtained for other radioactive elements. Soil parameters must be regarded too. The aim of the work was to test the character of ¹³⁷Cs and ⁴⁰K distribution in the topsoil vertical section for determination erosion-accumulation type and ratio in different time spans. The topsoil thickened by different types of erosion-accumulation processes was sampled at a 2–3 cm interval. Soil samples were analysed by means of scintillation gamma spectrometry. The relationship between ¹³⁷Cs and ⁴⁰K inventories was weakest in the topsoil formed by mixing of soil material during the installation of artificial drains. Based on climatic characteristics, variations of theoretical soil accumulation rate in the last 50 years were calculated for the topsoil accumulated predominantly by water erosion. ⁴⁰K and ¹³⁷Cs correlation in the bottom of vertical section of topsoil or arable horizon are closest and this section may be used as a complementary parameter determining the local inventory value.     

EXPERIENCE AND HISTORY: THE REACH AND LIMITS OF PHENOMENOLOGICAL APPROACHES TO HISTORY

Experience and History: Phenomenological Perspectives on the Historical World presents the summa of David Carr's phenomenological approach to history. I acknowledge the value of this perspective, but I find it doubtful that a phenomenological account can replace the paradigms of memory and representation against which Carr pits it. The concept of historicity is, rather, complementary in that it alerts us to the prethematic presence of history. Phenomenologically, Carr's attempt to tie history closely to experience runs into problems as it is based on a questionable use of Husserl's notion of retention and risks blurring the distinct temporality of history. At the same time, the central concepts of Carr's approach, both experience and narrative, could be deployed in further ways. As literary scholars have come to emphasize, narrative triggers experiences in its readers. Thus, even if it is impossible to recreate the experiences of historical protagonists, narrative lends itself to giving readers a sense of the experiential dimension of the past. In this sense, narrative is not only a medium of representation, but also a means of presence.     

Radiocarbon and dendrochronological dating of Sub-fossil oaks from Smarhoń riverine sediments

Sub-fossil oaks from Smarhoń in Belarus have been investigated and tree-ring chronologies were assembled. According to radiocarbon dating, the oldest oak grew from 5782–5612 cal BC and the youngest from 1575–1747 cal AD. Radiocarbon and dendrochronological dating of 97 samples, four single series, 10 mean curves (containing 2–9 series) and three chronologies (10–25 series) were constructed. The longest chronology (No. 16), covering 549 years, was absolutely dated against various oak chronologies of Polish/Baltic origin to AD 778–1326. Germination and dying-off phases were assessed from the three best replicated chronologies. A spectral analysis of the chronologies provided cycles of variable length, on average of 25 years.     

Integrating human dimensions of Arctic palaeoenvironmental science: SEAD – the strategic environmental archaeology database

Environmental change has a human dimension, and has had so for at least the last 10 000 years. The prehistoric impact of people on the Arctic landscape has occasionally left visible traces, such as house and field structures. More often than not, however, the only evidence available is at the microscopic or geochemical level, such as fossil insect and seed assemblages or changes in the physical and chemical properties of soils and sediments. These records are the subject of SEAD, a multidisciplinary database and software project currently underway at Umeå University, Sweden, which aims to create an online database and set of tools for investigating these traces, as part of an international research infrastructure for palaeoecology and environmental archaeology.     

WINNING THE HEARTS AND MINDS OF FARMERS: INSTITUTIONALIZED INNOVATION DIFFUSION IN SRI LANKA

Classical diffusion research, both in geography and sociology, received considerable criticism in the 1970s and 1980s, but after that the diffusion debate has faded away. At the same time, one of the earliest contributors to diffusion research, Gabriel Tarde, is now attracting the attention of both geographers and sociologists. Drawing on earlier experiences with agricultural extension and the Green Revolution, this Tarde‐inspired article aims to revitalize the diffusion debate through an ethnographic case study of extension practices in Hambantota District, Sri Lanka. The study is based on field material collected between 2009 and 2011, which includes semi‐structured interviews with representatives from various spread agencies – government agricultural instructors, NGOs, social enterprises, and the inorganic industry – as well as with farmers and other key informants. Following the recent work of Nigel Thrift, it is argued that such an approach to the study of innovation diffusion can be a way of uncovering “the political economy of propensity”. The article suggests that a return to Tarde should not lead researchers back into naïve diffusionism, or towards a position that blames traditionalist farmers for non‐diffusion. Non‐human actors can also exhibit resistance and sociality: innovations travel through a landscape which is both human and non‐human, and the spread of organic farming practices is configured by both bonds of trust among farmers and bonds of chemicals in the soil. Furthermore, it contends that future research may interrogate the ways in which the very medium of diffusion is being reconfigured, following actors' institutionalization of innovation diffusion methods.     

New specimens of Mourasuchus (Alligatoroidea,Caimaninae) from the Miocene of Brazil and Bolivia and their taxonomic and morphological implications

Cidade, G.M., Souza-Filho, J.P., Hsiou, A.S., Brochu, C.A., & Riff, D., 18 March 2019. New specimens of Mourasuchus (Alligatoroidea, Caimaninae) from the Miocene of Brazil and Bolivia and their taxonomic and anatomic implications. Alcheringa 43, 261–278. ISSN 0311-5518.

Mourasuchus is one of the most peculiar crocodylians of all time, showing an unusual ‘duck-faced’ rostrum with thin, gracile mandibles. It includes four species restricted to the South American Miocene. Here, we describe ten late Miocene specimens of Mourasuchus, nine from the Solimões Formation of Brazil and one from Bolivia. All specimens are assigned to M. arendsi, but this assignment may change as the diversity and relationships within Mourasuchus are better understood. We also discuss several issues pertinent to the morphology of Mourasuchus: the presence of a braincase neomorph (the laterocaudal bridge), hypotheses about sexual dimorphism, the function of the squamosal ‘horns’ the presence of possible thermoregulatory functions in the genus. Additionally, the paleogeographic distribution of Mourasuchus in the Miocene of South America is also discussed.

Giovanne M. Cidade* [giovannecidade@hotmail.com], Universidade de São Paulo Campus de Ribeirao Preto, Biologia, Avenida Bandeirantes 3900, Ribeirao Preto, 14040-900, Brazil; Jonas P. Souza-filho [jpdesouzafilho@hotmail.com], Universidade Federal do Acre, Departamento de Ciências da Natureza, Campus Universitário, UFAC, BR 364, Km 4, Distrito industrial, CEP 69915-900, Rio Branco, Acre, Brazil; Annie Schmaltz Hsiou [anniehsiou@ffclrp.usp.br], Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Departamento de Biologia, Avenida dos Bandeirantes, 3900, Ribeirão Preto, 14040-901, Brazil; Christopher A. Brochu [chris-brochu@uiowa.edu], University of Iowa, Iowa City, IA 52245, USA; Douglas Riff [driff2@gmail.com], Universidade Federal de Uberlandia, Uberlandia, 38400902, Brazil.