Richard Edan / Getty Images Oil shale is a type of sedimentary rock formation that can be used to produce oil and gas. Oil shale can produce oil and gas because of the presence of kerogen ...

Scientists have identified a mineral signature for sites that are more likely to contain rare fossils that preserve evidence of soft tissue — essential information to understanding ancient life. Much ...

For more than a century, shale and other sedimentary rocks containing a significant portion of solid waxy kerogens have been known as oil shale. When heated, the kerogens are converted to a type of ...

Shale is a sedimentary rock made up of tiny grains of silica, clay and other minerals. Many types of rock have few physical or chemical differences in a particular chunk of that rock.

Shale oil is derived from the similarly-named oil shale, a type of sedimentary rock that traps and retains precursors to oil and gas. Shale oil is a form of unconventional oil that is extracted ...

Could shale rock spur another energy bonanza ... Many environmentalists oppose it, citing potential Fukushima-type meltdown risks as well as the lack of a long-term repository for nuclear waste.

Click around the map to see where energy companies are using hydraulic fracturing, or fracking, to force tightly trapped oil and gas from the fine-grained sedimentary rocks known as shale.

In the last few years, a new type of proppant has come along ... placed at a higher pump rate which effectively exposed more shale rock. The uplift was impressive: 72% after 24 months and 81% ...