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Multiscale fracture analysis along the French chalk coastline for investigating erosion by cliff collapse
Abstract : Coastal cliffs of Upper Normandy and Picardy are eroded by cliff collapses of various sizes. This paper presents a multi-scale analysis of the pre-existing fractures embedded within the Cretaceous chalk. About 20 representative sites equally spaced along the 120-km long coastal section were analyzed and compared to a continuous structural analysis of the coast derived from aerial photographs taken in 1986. Ancient collapses interpreted on the aerial photos were compared to the pre-existing fracture content. Regional faults, pre-1986 collapse location and fracture density are spatially correlated. However, recent collapses observed on the field between 1998 and 2001 did not systematically correlate to the pre-existing fracture occurrence and therefore, there is no clear link between recent collapse and the regional faults.
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https://hal-insu.archives-ouvertes.fr/insu-00800017
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Submitted on : Wednesday, March 13, 2013 - 9:40:53 AM
Last modification on : Thursday, February 3, 2022 - 2:56:03 PM
Long-term archiving on: : Sunday, April 2, 2017 - 11:58:13 AM
Contributor : Adminhal Univbrestbu Connect in order to contact the contributor
Submitted on : Wednesday, March 13, 2013 - 9:40:53 AM
Last modification on : Thursday, February 3, 2022 - 2:56:03 PM
Long-term archiving on: : Sunday, April 2, 2017 - 11:58:13 AM
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GSL-SpPub-Genter-2004-1.pdf
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