Sea-level changes around the Cenomanian-Turonian boundary
Sea-level changes around the Cenomanian-Turonian boundary
复制标题
塞诺曼阶-土伦阶边界周围的海平面变化
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. Hancock
中科院分区：
文献类型：
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作者：
J. Hancock
摘要白垩岩系中广泛分布的硬地的地层位置标志着海平面海退槽的时间。使用这种技术，它已经有可能绘制日期的海退槽通过中塞诺曼到晚土伦在西北欧，这些日期可能是正确的其他地区的构造干扰。虽然在塞诺曼晚期的Metoicoceras geslinianum带的后半部分有一个海侵高峰，但有时被引用的靠近塞诺曼-土伦边界或在土伦早期的大海平面变化高实际上要晚得多，早在土伦中期的Collignoniceras woollgari带。
Abstract The stratigraphical position of widespread hardgrounds in chalk successions mark the time of regressive troughs of sea-level. Using this technique it has been possible to chart the dates of regressive troughs through the Middle Cenomanian to Late Turonian in north-west Europe, and these dates are probably correct for other regions free from tectonic interference. Although there was a transgressive peak during the later half of the Zone of Metoicoceras geslinianum in the Late Cenomanian, the great eustatic high that has sometimes been quoted close to the Cenomanian-Turonian boundary, or in the early Turonian, was actually appreciably later, early in the Zone of Collignoniceras woollgari of the Middle Turonian.