The global Campanian-Maastrichtian stage boundary

• 来源期刊: 幕-国际地学杂志（英文版）
• 学科: 地球科学
• 年，卷（期）: 2001,（4）
• 页码范围: 229-238
• 页数: 10页
• 分类号: P5
• 语种: 英文

摘要

The Campanian-Maastrichtian boundary has never been formally defined; in addition to a number of other less common uses two current practices exist: they consider the first occurrence (FO) of the boreal endemic key taxon Belemnella lanceolata (belemnite) and the last occurrence (LO) of the oceanic Radotruncana calcarata (planktonic foraminifera). Based on indirect correlation, the boreal FO is distinctly younger compared to the Tethyan LO.