The name is misleading. Oil shale, which is a convenient umbrella term for a variety of fine-grained and organic-laden sedimentary rocks, is not really oil at all. While it formed in prehistoric ...

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

Shale, also called mudstone, is a sedimentary rock formed from fine particles such as mud, silt, and clay. Shale is formed by finely bedded material that splits into thin layers. The pieces commonly ...

Mudstone, shale, and limestone are examples of sedimentary rock likely to contain fossils. As the layers of sediment build up on top of one another, they create a physical timeline. The oldest layers, ...

Sedimentary rocks that formed 390 million years ago, surprisingly, help provide the answer, at least for those who live above the Marcellus Shale formation, according to a team led by researchers ...

Shale gas and tight gas are unconventional natural gas types distinguished by the geological formations in which they are ...