川东北三叠系雷口坡组与须家河组界线微球粒的发现
Sedimentary Geology and Tethyan Geology(2012)
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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Key words
northeastern Sichuan,Triassic,Leikoupo Formation-Xujiahe Formation boundary,micropellet
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