What make up organic sedimentary rock?

Organic sedimentary rock is primarily composed of the remains of living organisms, particularly plants and animals. Common types include coal, formed from compressed plant material, and limestone, which can contain the shells and skeletal fragments of marine organisms. These rocks typically accumulate in environments like swamps and ocean floors, where organic material can be preserved over time. The lithification process then turns this organic material into solid rock through compaction and cementation.