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 ...

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type ... shale, and sandstone are all examples of sedimentary rocks.

Mudstone, shale, and limestone are examples of sedimentary rock likely ... Throughout the earth's history, each of the three rock types has been continuously formed and recycled into other types of ...