The Global Stratotype Section and Point(GSSP) for the base of the Katian Stage of the Upper Ordovician Series at Black Knob Ridge,Southeastern Oklahoma,USA

• 来源期刊: 幕-国际地学杂志（英文版）
• 年，卷（期）: 2007,（4）
• 页码范围: 258-270
• 页数: 13页
• 语种: 英文

摘要

The Global Boundary Stratotype Section and Point (GSSP)for the Katian Stage of the Upper Ordovician Series is defined as the 4.0 m-level above the base of the Bigfork Chert in the Black Knob Ridge section,southeastern Oklahoma.