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.

该油页岩呈深灰色或棕褐色 ,页理发育 ,主要由富含有机质纹层和浅灰色钙质纹层形成的毫米级沉积层偶组成。