Reconciling strontium-isotope and K–Ar ages with biostratigraphy: the case of the Urgonian platform, Early Cretaceous of the Jura Mountains, Western Switzerland

Alexis Godet, Karl B. Föllmi, Peter Stille, Stéphane Bodin, Virginie Matera, Thierry Adatte
2011 Swiss Journal of Geosciences  
During the late Early Cretaceous, the shallowwater domains of the western Tethys are characterized by the widespread deposition of Urgonian-type carbonates rich in rudists, corals and other oligotrophic, shallow-marine organisms. In the Helvetic Alps, the Urgonian occurrences have been dated by ammonite biostratigraphy as Late Barremian and Early Aptian. For the more proximal occurrences in the western Swiss Jura, a recent age model based on bio-, chemo-and sequence stratigraphy has been
more » ... d, which allows for an improved correlation with the Helvetic counterparts. In order to corroborate the recently proposed age model for the Jura, a set of well-preserved rhynchonellids collected from five different lithostratigraphical formations
doi:10.1007/s00015-011-0053-5 fatcat:bgb3sghfsvbpddz2fd65qsojoy