...文章详细信息 关键词： 生物地层;;岩石地层;;笔石;;沉积间断;;奥陶系;;志留系;;恩施;;湖北 [gap=1607]Keywords: biostratigraphy,lithostratigraphy,depositional hiatus,graptolites,Ordovician,Silurian,Enshi,Hub..
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This paper probed into the sea-level changes from the latest Ordovician to the earliest Silurian and thesubdivision of the Ordovician-Silurian boundary based on the study of biostratigraphy, chemical stratigraphyand sequence stratigraphy.
本文通过生物地层、化学地层和层序地层的研究，对晚奥陶世晚期至志留纪初期的海平面变化以及奥陶／志留系界线的划分进行了探讨。
参考来源 - 扬子海盆晚奥陶世晚期至志留纪初期海平面升降与奥陶/志留系界线的划分与对比With the improvement of related research resolution overseas, plenty of new data are accumulated, then the neccarity and importance of doing high precision planktonic foraminifera biostratigraphy research is emerged gradually.
随着国外相关研究精度的提高以及新资料的不断积累,对藏南海相白垩系进行高精度的浮游有孔虫生物地层研究的必要性日益凸显。
参考来源 - 西藏定日地区上白垩统浮游有孔虫生物地层研究新进展·2,447,543篇论文数据，部分数据来源于NoteExpress
华南二叠-三叠系界线研究应严格区分事件地层界线与生物地层界线。
Eventostratigraphic boundary and biostratigraphic boundary have to be clearly distinguished in the study of the Permian-Triassic boundary in South China.
通过生物地层、年代地层、岩石地层的研究，对四川盆地二叠系进行重新划分。
With study on biological stratigraphy, geochron stratigraphy, and lithologic stratigraphy, Permian is re-divided in Sichuan Basin.
本文为我国首次采用生物地层法探讨西太平洋麦哲伦海山区富钴结壳的生长年代。
The age of cobalt-rich crusts from the Magellan Seamount in the western Pacific has been first approached by using the method of biostratigraphic dating.
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