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.

该油页岩呈或棕褐 ,页理发育 ,主要由富含有机质纹层和浅钙质纹层形成的米级沉积层偶组成。