Early Jurassic to early cretaceous basin group of western Liaoning is a distinguished group of fault basin.

辽西地区的早侏罗世—早白垩世盆地群是一类颇具特色的断陷盆地群。

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It was rift basin from Early Middle Jurassic to Early Creaceous and squeezed sag basin since Cenozoic.

早、中侏罗世—早白垩世为拉张盆地，第三纪以来为挤压坳陷盆地。

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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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These dinosaurs lived for about 17 million years during the early Jurassic period.

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It lived during the middle to late Jurassic era in China's Liaoning province where many early birds and feathered dinosaurs roamed.

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