Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
| one publication added to basket [13412] |
The late quaternary sedimentary infill of Lake Annecy (northwestern Alps): an overview from two seismic-reflection surveys
Beck, C.; Van Rensbergen, P.; De Batist, M.; Berthier, F.; Lallier, S.; Manalt, F. (2001). The late quaternary sedimentary infill of Lake Annecy (northwestern Alps): an overview from two seismic-reflection surveys. J. Paleolimnol. 25: 149-161. http://dx.doi.org/10.1023/A:1008175728826
In: Journal of Paleolimnology. Springer: Dordrecht; London; Boston. ISSN 0921-2728; e-ISSN 1573-0417, meer
|  |
| Author keywords |
deglaciation; Holocene; Alps; lacustrine sedimentation; seismic stratigraphy; slumping |
| Auteurs | | Top |
- Beck, C.
- Van Rensbergen, P., meer
- De Batist, M., meer
|
- Berthier, F.
- Lallier, S.
- Manalt, F.
|
|
| Abstract |
The sedimentary fill of Lake Annecy (northwestern Alps) - related to the last glacial/post-glacial episode - was investigated through high resolution (sparker) and very high resolution (2.5 kHz) seismic-reflection surveys. A seismostratigraphic approach led to subdivision of a 150 m-thick pile (maximum thickness in axial part) into five units. Basal units (1 and 2) represent an imbrication of subglacial and glacio-lacustrine deposits, close to the grounding line of the glaciers'' fronts (respectively at the northern and southern terminations of the lake). The first acoustically well-stratified unit (3) developed during a fast retreat of the glaciers fronts far from the lake basin, and a progradational alluvial regime, with abundant underflows, in a lake larger than the present one. Unit 4 represents the progressive decrease of this clastic input mixed with the progressive development of in situ bio-induced production. As in many other alpine lakes, a topmost unit (5), relatively thin (about 8-10 m) and with a conspicuous drape configuration, is the signature of the Holocene interglacial climatic conditions with a sedimentation rate of about 1 mm/yr. On the lacustrine basin slopes, slumps and debris flow occurred mainly within Unit 3; they may be due to, either climate-induced high rate terrigenous sedimentation, or/and to a period of increased seismo-tectonic activity. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
