The Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous： Pueblo, Colorado, U.S.A.
The Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous： Pueblo, Colorado, U.S.A.
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DOI：
10.18814/epiiugs/2005/v28i2/003
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发表时间：
2005-06
期刊：
影响因子：
3.1
通讯作者：
W. Kennedy;I. Walaszczyk;W. A. Cobban
中科院分区：
文献类型：
--
作者：
W. Kennedy;I. Walaszczyk;W. A. Cobban
根据国际地层学委员会的建议，（16票赞成[94%]，1票反对，2票未收到），全球边界层型剖面和点白垩系土伦阶的基底被定义为丹佛河和格兰德河西端的格林霍恩石灰岩组的桥溪石灰岩段的第86层基底美国科罗拉多普韦布洛西部普韦布洛水库州立公园娱乐区北边界附近的铁路切断。该GSSP层位也暴露在相邻的州娱乐区中并受到保护。它与菊石Watinoceras devonense的第一次出现相吻合，是在一个全球性的碳-13同位素的正偏移的中间，并被广泛的镁铝榴石，产量edages为93至93.5马。
Following the recommendation of the International Commission on Stratigraphy (16 votes Yes [94%], 1 abstention, 2 votes not received), the Global boundary Stratotype Section and Point (GSSP) for the base of the Turonian Stage of the Cretaceous System is defined as the base of bed 86 of the Bridge Creek Limestone Member of the Greenhorn Limestone Formation at the western end of the Denver and Rio Grande Railroad cut near the north boundary of the Pueblo Reservoir State Park Recreation Area, west of Pueblo, Colorado, USA. This GSSP horizon is also exposed and protected in the adjacent state recreation area. It coincides with the first occurrence of the ammonite Watinoceras devonense, is in the middle of a global positive excursion in Carbon-13 isotopes, and is bracketed by widespread bentonites that have yield edages of 93 to 93.5 Ma.