ชั้นของหินที่ไม่ยอมให้ของเหลวหรือก๊

A layer of rocks that do not allow liquids or gases flow through the layers of rock that is not acceptable, providing gas or liquid flowing through. Cover the top layer of stone blocks and the catchment of the petroleum, hydrocarbon escape to the surface of soil. [PI growing petroleum products]

A layer of rocks that do not allow fluid or gas flow, the layers of rock that does not allow the fluid or gas flow. Cover the top of the layer of rock reservoir. And blocking the escape of hydrocarbons to the surface soil. [Petroleum]

A layer of stone not liquid or gas flow.A layer of stone not liquid or gas flow. Cover on top of the layer of rock, petroleum storage Block hydrocarbon and escape to the soil surface. [petroleum].