GEOLOGY

Detailed explanation-1: -Petrified fossils are fossils in which minerals replace all or part of an organism. Another type of fossil is a carbon film, an extremely thin coating of carbon on rock. Trace fossils provide evidence of the activities of ancient organisms.

Detailed explanation-2: -A carbonaceous film or carbon film is an organism outline of a fossil. It is a type of fossil found in any rock when organic material is compressed, leaving only a carbon residue or film.

Detailed explanation-3: -Carbonization is a type of fossil preservation in which the organism is preserved as a residual, thin film of carbon instead of the original organic matter. Leaves, fish, and graptolites are commonly preserved in this way.

Detailed explanation-4: -Fossil fuels include coal, petroleum, natural gas, oil shales, bitumens, tar sands, and heavy oils. All contain carbon and were formed as a result of geologic processes acting on the remains of organic matter produced by photosynthesis, a process that began in the Archean Eon (4.0 billion to 2.5 billion years ago).

Detailed explanation-5: -Types of Fossils-Body, Molecular, Trace & Carbon Fossil.