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The "Bois du Peu" thrust sheets (external French Jura mountains):re-examining the concept of "Fault-Fold"

Abstract : Significant reconnaissance field work along a road project which crosses the site of the “Bois du Peu" thrust sheets (near Besançon, Eastern France), provides us the opportunity to re-examine the concept of “fault-folding" (in french, “faille-pli”) which was introduced by Glangeaud (1944) to account for the observed tectonics of the Jura mountains and, more specifically, external Jura. From a theoretical point of view, we contend that this concept is incompatible with general principles of balanced cross-sections and has to be rejected. We show that in the “Bois de Peu" area, data fit with a deformation model which associates several modes of folding (fault-propagation fold and fault-bend fold). The decollement level related to these folds is located into Keuper strata, Oxfordian-Argovian levels being used locally as a secondary decollement level.
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Preprints, Working Papers, ...
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Contributor : Grégory Bièvre Connect in order to contact the contributor
Submitted on : Monday, October 4, 2010 - 5:25:28 PM
Last modification on : Wednesday, April 27, 2022 - 3:47:37 AM
Long-term archiving on: : Wednesday, January 5, 2011 - 2:56:17 AM


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  • HAL Id : insu-00442191, version 2


Grégory Bièvre, Eric Mercier. The "Bois du Peu" thrust sheets (external French Jura mountains):re-examining the concept of "Fault-Fold". 2010. ⟨insu-00442191v2⟩



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