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The discovery of the micropellets from the Triassic Leikoupo Formation-Xujiahe Formation boundary in northeastern Sichuan
Author(s): LIU Yan-ting, FU Heng, CHEN Ji, SUN Xian-zhang, DA Li-ya, LIU Xin, SUN Li-chuan, YUE Wen-cheng
Pages: 49-
51
Year: 2012
Issue:
2
Journal: Sedimentary Geology and Tethyan Geology
Keyword: 微球粒; 雷口坡组与须家河组界线层; 三叠系; 川东北;
Abstract: 在川东北地区三叠系雷口坡组与须家河组地层界线处首次发现微球粒.这些微球粒呈单球体,形状为实心圆球状,直径3~4μm.微球粒成分为硅质球,可见溶蚀结构,推测研究区在中、晚三叠世之交可能发生过陨击事件,为研究四川盆地三叠纪海陆演变、生物更替提供了一种新的研究思路.
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