--> ABSTRACT: Geotechnical and Sedimentological Properties of Nice Slope and Submarine Var Canyon Deposits, by Pierre Cochonat, Thierry Schieb, Jean Guillaume, Rene Kerbrat, Jean-Paul Tisot, Gerard-A. Auffret, and Carla Muller; #91032 (2010)
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Previous HitGeotechnicalNext Hit and Sedimentological Properties of Nice Slope and Submarine Var Canyon Deposits

Pierre Cochonat, Thierry Schieb, Jean Guillaume, Rene Kerbrat, Jean-Paul Tisot, Gerard-A. Auffret, Carla Muller

The submarine topography of the Baie des Anges consists of a narrow shelf and a steep slope where about 1,000 m-thick Pliocene-Quaternary deposits overlie the Messinian erosion surface. After a stage of rapid development, this large sedimentary body was submitted during the Quaternary to degradation through active mass-wasting processes.

Thirteen piston cores were taken in several parts along the flanks and the floor of the Var canyon. Logging of these cores included gamma-density measurements, sedimentary structure descriptions, and microfacies observations (nannofossils). The cores were also sampled for a first Previous HitgeotechnicalNext Hit analysis. Previous HitGeotechnicalNext Hit parameters such as water content, bulk density, vane shear strength, and Atterberg limits allowed us to study the response of surficial sediments to the vertical effective pressure and to discriminate several Previous HitgeotechnicalTop groups related to different genetic types of sediment. Particularly the consolidation state was evaluated with the calculated ratio between undrained cohesion and vertical effective pressure (Cu/P). The sediment stability was assessed using the nfinite slope stability analysis method under undrained conditions. Results of this preliminary analysis show that sedimentary instabilities could occur on important slopes.

AAPG Search and Discovery Article #91032©1988 Mediterranean Basins Conference and Exhibition, Nice, France, 25-28 September 1988.