Search results for "Sédimentaire"
showing 8 items of 18 documents
Marqueurs de tectonique synsédimentaire dans les séries syn- et post-rift du bassin intérieur du Gabon.
2006
9 pages; International audience
Dynamique sédimentaire des dépôts post-rift du bassin intérieur du Gabon.
2006
14 pages; International audience
Influence de différentes pratiques agricoles sur la qualité et la santé des sols : étude de cas sur des vergers slovènes irrigués ou en agriculture b…
2011
Underestimation of soil properties and poor understanding of soil conditions can have many negative consequences, which results in quality or quantity of yield, soil degradation or even environmental pollution. According to importance of agricultural practices, our study focused on their impact on soil quality and health. The research took place from November 2003 to October 2007 in apple orchards in north-eastern Slovenia where two frequent agricultural practices were investigated: (i) drip irrigation on Calcaric Cambisol and its effects on structural stability and microbial biomass at Gačnik experimental station and (ii) combination of organic fertiliser (Campo guano) and liming in organi…
Relationships between societies and their environment in the Sahel in southwestern Niger over the past four thousand years : a geoarchaeological appr…
2013
The Sahel, a zone between the Sahara Desert and the Sudan forests, is currently experiencing major environmental changes. Since the droughts in 1970s and 1980s, and with the high population growth rate, vegetation cover has deteriorated considerably, contributing to increased runoff and soil erosion. Starting from this observation, we undertook the study of past societies in the Niamey region, to assess their impact on the environment. The lack of archaeological data meant that it was necessary to identify key indicators of occupation during the Neolithic and the Iron Age. In addition to providing new evidence to date the Neolithic site of Kirkissoy, a sedimentary study was conducted on a p…
Diffusion régionale du silex crétacé des minières de Saint-Gond (Marne, France) au Néolithique récent et final
2018
International audience; La région des Marais de Saint-Gond (Marne) comporte un très grand nombre de sites néolithiques. Elle est surtout connue pour ses nombreuses sépultures collectives en hypogées et en allées couvertes. Des ateliers de taille et des habitats y ont également été détectés. Tous ces sites ont fourni des quantités de silex taillés. L’origine de ces silex et le contexte géologique de la région n’avaient pas encore fait l’objet d’une étude détaillée. Depuis 2012 les prospections ont permis de localiser 17 minières et plusieurs dizaines d’affleurements de bancs de silex. Ces données montrent que le silex est très abondant dans la région et qu’il a été intensément exploité au Né…
Elevage et consommation en territoire arverne. : De l'agglomération d'Aulnat aux oppida du bassin clermontois, changements ou continuité ?
2010
Textes en français et en allemand. - Actes du 34ème colloque de l'AFEAF organisé du 13 au 16 mai 2010 à Aschaffenburg Allemagne). - Textes et avant-propos en allemand et en français. Bibliogr. en fin de contributions; International audience
Approche d'un territoire de montagne : occupations humaines et contexte pédo-sédimentaire des versants du col du Petit-Saint-Bernard, de la Préhistoi…
2014
As part of a multi-year programme, survey campaigns have been carried out on both slopes of the Petit-Saint-Bernard pass (2188 m, western Alps), at an altitude of between 750 and 3000 m. The method employed abandons ground-based surveying in favour of multiple manual surveys carried out on selected topographic contexts down to the base of the Holocene fill. The results obtained document the longterm development of the pedo-sedimentary dynamic and the occupation of the different altitude stages. The significance of the archaeological data collected is discussed in relation to the state of knowledge in a comparison area including the neighbouring valleys of the western Alps, to existing settl…
Quantification de la dynamique sédimentaire en contexte anthropisé. L'érosion des versants viticoles de Côte d'Or.
2007
The wine slopes of Côte d'Or (Burgundy, France) are subject to the combined effects of runoff/erosion processes and intense cultivation practices. The purpose of this study is to characterize the erosion processes, and to quantify the sedimentary dynamics over different time scales and spatial scales. Sedimentary budgets show that the studied slopes, with grounds that are made very sensitive to the runoff phenomena by intensive mechanisation, are subject to erosion rates of several millimetres per year. Overflow triggering and its extension, which determine sediment transfer distances, are dependent on a runoff threshold. The existence of this threshold is observed through the analysis of t…