what types of sedimentary rocks are formed from the remains of dead organisms
By John Bestoloffe. When rocks are formed from dead organisms and/or rocks that currently exist, they are called sedimentary rocks. They can be divided into three types: clastic, organic, and chemical. Clastic sedimentary rocks are rocks that form from broken pieces of other rocks.Organic sedimentary rocks are formed from the remains of once living creatures and plants.Chemical sedimentary rocks are composed of mineral crystals. These crystals are made from dissolvable elements that are formed by a chemical process and typically found in water.hey can be divided into three types: clastic, organic, and chemical. Clastic sedimentary rocks are rocks that form from broken pieces of other rocks. Organic sedimentary rocks are formed from the remains of once living creatures and plants. Chemical sedimentary rocks are composed of mineral crystals.