In lamina of shale which deposited in deep lake away from paleo-debouchment in the Shahejie Formation in the Jiyang Depression, some aeolian silty sand was discovered.

该油页岩呈深棕褐 ,页理发育 ,主要富含有机质纹层和浅质纹层形成的毫米级沉积层偶组成。