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Reconciling strontium-isotope and K–Ar ages with biostratigraphy: the case of the Urgonian platform, Early Cretaceous of the Jura Mountains, Western Switzerland
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 beendoi:10.1007/s00015-011-0053-5 fatcat:bgb3sghfsvbpddz2fd65qsojoy