GEOLOGY

Detailed explanation-1: -Organic-rich sedimentary rocks are a specific type of sedimentary rock that contains significant amounts (>3%) of organic carbon. The most common types include coal, lignite, oil shale, or black shale.

Detailed explanation-2: -Organic sedimentary rocks form from the action of organisms. Examples include fossiliferous limestone and coal. Fossiliferous limestone and coal are two examples of organically-formed sedimentary rocks.

Detailed explanation-3: -Coals are the most abundant organic-rich sedimentary rock. They consist of undecayed organic matter that either accumulated in place or was transported from elsewhere to the depositional site. The most important organic component in coal is humus.

Detailed explanation-4: -Bituminous coal is an organic sedimentary rock formed by diagenetic and sub metamorphic compression of peat bog & swamp material. Its primary constituents are macerals: vitrinite, and liptinite.