The Cretaceous of the Swiss Jura Mountains: an improved lithostratigraphic scheme

Details

Serval ID
serval:BIB_6F1044AF7C36
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The Cretaceous of the Swiss Jura Mountains: an improved lithostratigraphic scheme
Journal
Swiss Journal of Geosciences
Author(s)
Strasser André, Charollais Jean, Conrad Marc André, Clavel Bernard, Pictet Antoine, Mastrangelo Bruno
ISSN
1661-8726
1661-8734
Publication state
Published
Issued date
09/2016
Peer-reviewed
Oui
Volume
109
Number
2
Pages
201-220
Language
english
Abstract
In the course of the HARMOS project of the Swiss Geological Survey, the lithostratigraphic subdivisions of the Cretaceous sedimentary rocks outcropping in the Swiss Jura Mountains were revisited. New formation names are proposed where only inadequate facies terms existed so far. As in some cases outcrop conditions in the Swiss Jura do not allow for logging complete sections to characterise the formations, type localities in neighbouring France have been chosen. The following formations (Fm.) are defined to describe the Cretaceous lithological units (from bottom to top): Goldberg Fm., Pierre-Châtel Fm., Vions Fm., Chambotte Fm., Vuache Fm., Grand Essert Fm., Gorges de l’Orbe Fm., Vallorbe Fm., Perte du Rhône Fm., Narlay Fm. Dating of the formations is based on biostratigraphy (ammonites, echinids, dasycladalean algae, foraminifera, calpionellids, dinocysts, nannofossils). The fossils indicate Berriasian through to Coniacian ages. The lithostratigraphic units describe the general evolution from a shallow, peritidal platform to deeper-water shelf environments, then the installation of a carbonate platform, and finally the drowning of this platform followed by the predominance of pelagic conditions. The common lateral and vertical changes in facies and sedimentation rates as well as numerous hiatuses within the formations testify to a complex interplay of tectonics, climate, and sea level that controlled the Swiss Jura realm during the Cretaceous.
Keywords
Swiss Jura, Cretaceous, Lithostratigraphy, Geological maps
Web of science
Create date
15/02/2023 12:33
Last modification date
16/02/2023 7:52
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