A sedimentary rock containing kerogen from which petroleum-like shale oil can be produced by pyrolysis, hydrogenation, or thermal dissolution.

A rock formation in the Canadian Rockies that contains very many fossils from the Cambrian period.

(geology) A dark, muddy rock, rich in sulfides and organic material.

Natural gas extracted from shale.

An argillaceous shale impregnated with bitumen.

plural of shale gas

plural of shale oil

(geology) alum slate