Often referred to as the rock that burns, oil shale boasts a high concentration of petroleum-like kerogens ... Horizontal drilling technology allows companies to turn their wells underground to follow ...

Shale oil mainly refers to liquid hydrocarbons trapped in formations of shale rock that can be extracted for refining. It is often found in organic-rich shale and thin interlayers of carbonate ...

"Scroll Down through History" displays the layers of rock exposed within the Grand Canyon ... Toroweap Formation, and Hermit Shale. The Coconino Sandstone layer was deposited not by the sea ...