48 A new concept of karst development based on hydrogeology and geophysics limestone marking the end of the Laeviuscula zone, D7bis, located at an altitude of approximately 91.0 m. The thickness of the Laeviuscula and Propinquans formations is estimated to be at least 13 m. In the east, the “survey with climbing” allows the entire height of the cliff to be recognized from the Lower Bajocian, with the continuity of a joint in the “ash cave,” where dolomitized limestones with Trichites are observed in metric benches ending in a level of small decimeter-sized vacuoles. Figure 5 Aalenian/Bajocian transition.
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