The cover décollement at the “ball trap” site. A1 and A2. Interpreted geological cross-section. B1 and B2. Detail of the contact between the pre-rift cover and the Urdach mantle rocks with location of samples described in text. Note the presence of metasomatic veins (tension gashes: close up in E). C. Microscopic view of sample URD14 containing Liassic microfauna (determination J. Canérot). D. The URD15 listvenite. E. Alternating calcite and serpentine thin layers in a metasomatic vein (sample URD17a). F. Ophicalcites in the “ball trap” cover décollement foot wall (sample URD17b). Location of samples in shown in A2 and B2.

Le décollement de couverture au site du « ball trap ».