early and middle jurassic 早中侏罗世
middle jurassic-early cretaceous 中侏罗世早白垩世
early to middle jurassic 早中侏罗世
The Early-Middle Jurassic strata were probably deposited in an extensional basin above the Lapeiquan fault.
早中侏罗世地层可能为拉配泉断裂之上的伸展盆地沉积。
This is a model of telemagmatic metamorphism and a character of coal metamorphism early-middle Jurassic in northwest of China.
属于区域岩浆热变质作用的一种模式，也是西北地区早中侏罗世煤变质的特点之一。
In these process of evolution, it deposited mainly hydrocarbon source rocks of lacustrine facies in the Early Cretaceous and secondary coal measures source rocks in Early-Middle Jurassic.
主要形成了下白垩统半深湖相烃源岩，其次为中下侏罗统煤系烃源岩。
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