GIGUET-COVEX , Charline

Pollen analyses were undertaken on three small peatbogs, located on the Anterne mountain (Upper-Arve Valley, French north-western Alps) at different altitudes - 1855, 2060 and 2235 m asl, respectively. Their comparative study allowed for the detremination of the role played by human activity in Holocene vegetation dynamics of the nowadays...

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Edytem equipe 1 2003-2010

It is a common practice to reconstruct glacier activity from lake sediment records. Such an approach is generally applied to proglacial lakes. However in some cases, terrigenous inputs from glaciated areas are dominating enough to make distant sedimentary basins sensitive to glacier fluctuations. This is the case in Lake Bourget, located on the...

Two well-dated ca Holocene-long sedimentary sequences from deepest parts of Lake Bourget provide new insights onto the evolution of erosion patterns at a regional scale in NW European Alps. The combination of high resolution geochemistry e XRF core scanning, calibrated by 150 punctual measurements e and isotope geochemistry ( 3Nd) of the...

A high-resolution sedimentological and geochemical study was performed on a 20 m long core from the alpine Lake Anterne (2063 m a.s.l., NW French Alps) spanning the last 10 ka. Sedimentation is mainly of minerogenic origin. The organic matter quantity (TOC%) as well as its quality (hydrogen (HI) and oxygen (OI) indices) both indicate the...

High-resolution record of Holocene erosion patterns in a high altitude lake (Lake Anterne, NW French Alps): a witness of environmental changes, climatic variability and human activities

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In this paper we present a review of a ca. 10-years research effort (1-9) aiming at reconstructing floods dynamicsin in French Alps through the Holocene, based on lake sediment records. We will particularly discuss how such geological records can be considered as representative of past climate. This implies a wise interpretation of data in...

A high-resolution sedimentological study of Lake Bourget was conducted to reconstruct the flood frequency and intensity (or magnitude) in the area over the last 350 years. Particular emphasis was placed on investigating the spatio-temporal distribution of flood deposits in this large lake basin. The thicknesses of deposits resulting from 30...

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Apport de la bioarchéologie des dépôts coprogènes à la connaissance du pastoralisme Néolithique : le projet CoproArchéo

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We review the scientific efforts over the last decades to reconstruct erosion from continuous alpine lake sediment records. We focused both on methodological issues, showing the growing importance of non-destructive high resolution approaches (XRF core-scanner) as well as progresses in the understanding of processes leading to the creation of...

In this paper we review the scientific efforts that were led over the last decades to reconstruct geomorphic patterns from continuous alpine lake sediment records. Whereas our results point a growing importance of humans as erosion forcing factors, we will focus here on climate-related processes. Our main dataset is made of a regional approach...

Sediments of Lake Paravani, the largest natural lake in the South Caucasus, were analysed to reconstruct the millennial history of the environment. Pollen analysis, previously undertaken on the first core retrieved in the middle of the lake, revealed a vegetation history for the last 12 millennia. As part of the present study, a new core was...