Sandstone rock in Zhengnan slope is sector sedimentary under water which is formed in the fourth section of Shahejie formation in Paleogene period.

• 东营凹陷郑南斜坡带砂砾岩体是古近纪沙四段沉积时期形成的以砂、砾岩为主的近岸水下扇沉积体。