Ammonite correlation of the uppermost Campanian of Western Europe, the U.S.Gulf Coast, Atlantic Seaboard and Western Interior, and the numerical age of the base of the Maastrichtian
Ammonite correlation of the uppermost Campanian of Western Europe, the U.S.Gulf Coast, Atlantic Seaboard and Western Interior, and the numerical age of the base of the Maastrichtian
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西欧最上坎帕阶、美国墨西哥湾沿岸、大西洋沿岸和西部内陆的菊石对比以及马斯特里赫特阶底部的数值年龄
DOI：
10.1017/s0016756800019580
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发表时间：
1992
影响因子：
2.3
通讯作者：
G. R. Scott
中科院分区：
文献类型：
--
作者：
W. Kennedy;W. A. Cobban;G. R. Scott
如果把马斯特里赫特阶的底界放在西欧箭石Belemnella lanceolata首次出现的地方，那么美国西部内陆的Campanian阶和Maastrichtian阶的分界线可能位于Baculites jenseni和Baculites eliasi带之间。B。根据Nostoceras（N.）hyatti斯蒂芬森和Jeletzkytes nodosus（Owen），它们的范围在波兰的维斯瓦河谷层序中的坎帕尼亚阶顶部，但在B首次出现之前就消失了。披针形。根据西部内陆地区辉长岩中高温计时器的数据，马斯特里赫特期的年龄介于73.2 ± 0.7和70.1 ±0.7 Ma之间。
Abstract If the base of the Maastrichtian Stage is placed at the first appearance ofthe belemnite Belemnella lanceolata in Western Europe, the boundary between the Campanian and Maastrichtian stages in the U.S. Western Interiormay lie between the zones of Baculites jenseni and Baculites eliasi. The B. jenseni Zone can be shown to be latest Campanian in age on the basis of the occurrence of Nostoceras (N.) hyatti Stephenson and Jeletzkytes nodosus (Owen), which range to the top of the Campanian in the well-dated Vistula Valley sequence in Poland, but disappear before the first appearance of B. lanceolata. So defined the numerical age of the Maastrichtian lies between 73.2 ± 0.7 and 70.1 ±0.7 Ma, based upon dates from high temperature chronometers in bentonites in the Western Interior.