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Active tectonics, seismicity and geomorphology with special reference to Normandy (France)

Abstract : Integrated studies based on tectonic, seismotectonic and geomorphological analyses indicate that Normandy (northwest France) has been an active area during the Quaternary. Topography and landform discontinuities reflect the dislocation and differential uplift of a late Cenozoic platform. The tectonic activity is represented by (i) active faults, indicated by linear scarps and seismic activity, (ii) offsetting of pre-existing surfaces, (iii) Plio-Pleistocene sedimentation restricted within narrow subsiding zones, and (iv) morphometric properties of drainage basins that indicate zones of differential uplift. The inferred strain pattern involves (i) a shortening direction that strikes NW–SE as expected in the European context of Alpine compression, and (ii) a NE–SW trending extension accommodated by NW–SE normal faults. The geomorphological systems encountered in Normandy preferentially record differential vertical displacements.
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https://hal.archives-ouvertes.fr/hal-00175513
Contributor : Marianne Font-Ertlen Connect in order to contact the contributor
Submitted on : Friday, September 28, 2007 - 2:40:54 PM
Last modification on : Tuesday, October 19, 2021 - 11:33:57 PM

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J.L. Lagarde, S. Baize, D. Amorese, Bernard Delcaillau, Marianne Font, et al.. Active tectonics, seismicity and geomorphology with special reference to Normandy (France). Journal of Quaternary Science, Wiley, 2000, 15 (7), pp.745-758. ⟨10.1002/1099-1417(200010)⟩. ⟨hal-00175513⟩

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