کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6432581 | 1635435 | 2014 | 14 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Geophysical and geomorphological investigations of a Quaternary karstic paleolake and its underground marine connection in Cassis (Bestouan, Cassis, SE France) Geophysical and geomorphological investigations of a Quaternary karstic paleolake and its underground marine connection in Cassis (Bestouan, Cassis, SE France)](/preview/png/6432581.png)
- Geophysical methods are used to describe the morphology of a coastal polje.
- Connection between the polje and a submarine spring through a karst is proposed.
- The chronological evolution of this karstic system is detailed.
An original karstic system in a coastal alluvial plain located in a carbonate environment (Cassis, Provence - SE France) was studied using a multi-method approach (electrical resistivity tomography, gravimetric, passive seismic survey), combined with geomorphologic methods, surface observations and drilling. Limestone dissolution and/or cavity collapse led to the development of a polje, which was filled rapidly by erosion of Aptian marls. The combination of several dating and paleoenvironmental proxies indicates that the polje was filled during a glacial period (MIS 6, 8 or 10, i.e. in the 130-360Â ka age range). This discovery has implications for the understanding of karst processes. The connection between the polje and the three km-long Bestouan underwater karstic conduit with submarine outlet is strongly suggested by sedimentological studies and geophysical prospections.
Journal: Geomorphology - Volume 214, 1 June 2014, Pages 402-415