New data on the age of the installation of Urgonian-type carbonates along the northern Tethyan margin: biostratigraphy of the Chopf Member (Helvetic Alps, eastern Switzerland)
- 作者：Sté ; phane Bodin ; Jean Vermeulen ; Alexis Godet and Karl B. Fö ; llmi
- 关键词：Helvetic platform ; Switzerland ; Drusberg Formation ; Urgonian limestone ; Late Barremian ; Carbon isotope curve
Mots-clé ; s ; Plateforme helvé ; tique ; Suisse ; Formation du Drusberg ; Calcaire urgonien ; Barré ; mien supé ; rieur ; C - 刊名：Comptes Rendus Geoscience
- 出版年：2006
- 期刊代码：87_16310713
- 类别：ear
- 出版时间：August 2006
- 卷：338
- 期：10
- 页码：727-733
- 文件大小：559 K
摘要
The Chopf Member is a glauconitic, phosphate-bearing succession that occurs in the distal part of the Helvetic Alps (eastern Switzerland). The recent discovery of age-diagnostic ammonites within this horizon allows for its attribution to the lower part of the Gerhardtia sartousiana zone (middle Late Barremian). This new age corresponds to a maximal age for the onset of the Schrattenkalk Fm. in this area, and is coeval with the onset of the Urgonian facies in other parts of the western Tethyan realm. This new age allows also for a more precise dating of Late Barremian Click to view the MathML source">δ13C curves. To cite this article: S. Bodin et al., C. R. Geoscience 338 (2006).