1 Although nobody told Mr. Callahan until it was too late, the dark-hued shale rocks found in pockets along the Western Slope were oil shale. Often referred to as the rock that burns, oil shale boasts ...

Instead, a different natural geologic phenomenon causes oil shale trapped in sedimentary rocks to heat up and combust spontaneously, smoldering once exposed to oxygen. The Hope Ranch site flares ...

Shale is a sedimentary rock made up of tiny grains of silica, clay and other minerals. Many types of rock have few physical ...

Fracking-the high-pressure injection of water, chemicals and sand into shale deposits to release the gas and oil trapped within the rock-in recent years has been combined with horizontal drilling ...

US oil and gas production exploded in the past 15 years as drillers found ways to unlock vast deposits locked in shale rocks. Wall Street funded a headlong drilling race that made the US the world ...