what is a chemical fossil
Chemical fossils are chemicals found in rocks and fossil fuels (petroleum, coal, and natural gas) that provide an organic signature for ancient life. Molecular fossils and isotope ratios represent two types of chemical fossils.he fossils themselves are referred to as the fossil record. The fossil record was one of the early sources of data underlying the study of evolution and continues to be relevant to the history of life on Earth.
Nonetheless, much of the eventual preservation still depends on the chemical composition of the deposits in which the fossil remains are embedded. Within the deposits, the fossil can be partly converted into other minerals by the influence of chemical processes. In that case, the internal structure of the fossil remains well preserved.