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志留纪
Silurian period
- BS盆地是发育在奥陶纪、志留纪、石炭纪及三叠纪基底地层之上的第三纪沉积盆地。
The BS basin is a Tertiary sedimentrary basin occurred on Ordovician,Silurian Carboniferous and Triassic basement strata. - 依据同位素测年资料和地质构造演化确定该岛弧火山岩就位于志留纪,这对东昆仑地区的地质构造演化具有重要意义。
Based on the isotopic dates and the studies of the geotectonic evolution,the island-arc volcanic rocks were suggested to be Silurian age. - 2004年我们在玛依岗日一带变质岩系上部采获大量鹦鹉螺类和笔石类化石,经研究确定时代属中、晚奥陶世-志留纪.
From 2003 to 2004, we collected a large amount of Nautiloid and Graptolite fossils in upper metamorphic formations of Mayigangri area and determined the age to be middle and Late Ordovician-Silurian.
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