Question

Which main type of sedimentary rock forms from dead plants and animal material

Answer 1

coal

That is because coal is made up of remains of plants—dead wood, bark, leaves, stems, and roots. Coal is an unusual sedimentary rock because it forms from plants instead of earlier rocks. The coal people use today started forming millions of years ago in swamps.

Answer 2

Detritus can be either organic or inorganic. Organic detrital rocks form when parts of plants and animals decay in the ground, leaving behind biological material that is compressed and becomes rock. Coal is a sedimentary rock formed over millions of years from compressed plants.