High-resolution biotratigraphy and chemostratigraphy of the Cenomanian/Turonian boundary event in the Vocontian Basin, southeast France

详细信息	查看全文 | 推荐本文 |

• 作者：Daniè ; le Grosheny ; Bernard Beaudoin ; Laurence Morel and Delphine Desmares
• 关键词：Cenomanian/Turonian boundary ; Southeast France ; Vocontian Basin ; Planktic foraminifera ; Carbon isotopes
• 刊名：Cretaceous Research
• 出版年：2006
• 期刊代码：114_01956671
• 类别：abs
• 出版时间：October 2006
• 卷：27
• 期：5
• 页码：629-640
• 文件大小：639 K

摘要

The Cenomanian/Turonian boundary black shale has been traced in southeastern French subalpine ranges in several sections correlated over tens of kilometres, both on a bed-by-bed basis and with the control of δ¹³C isotope curves. Correlations show a thickness increase slopeward and a slight increase in the time span of black shale deposition basinward. They also show that the Vergons section cannot be used as a local reference section for Ocean Anoxic Event 2 (OAE2) because it has probably been affected by synsedimentary sliding. Finally they show that the vertical range of the Whiteinella archaeocretacea Zone changes considerably over short distances. This could be easily understood in widely separated basins but is harder to explain at such a local scale. In addition, using results obtained in the US Western Interior Basin, we question the validity of this Partial Range Zone.