Petrified remains are the fossilized remains of plants and animals that have been preserved in the earth for millions of years. The term 'PETRIFIED' refers to the process of fossilization, which occurs when minerals replace the organic material of the organism over time. The most common type of PETRIFIED remains is a FOSSIL, which is the mineralized form of an organism that has been preserved in the earth's sedimentary rocks. Fossils are typically found in sedimentary rock layers, and they provide evidence of the past life forms that existed on Earth.