GEOLOGY

Detailed explanation-1: -A cast is a solid copy of the shape of an organism. Molds and casts can preserve fine details. an organism become petrified . The term petrified means “turned into stone.” Petrified fossils are fossils in which minerals replace all of an organism, or a part, such as a dinosaur bone.

Detailed explanation-2: -A cast is a solid copy of the shape of an organism. Petrified fossils are fossils in which minerals replace all or part of an organism. Another type of fossil is a carbon film, an extremely thick coating found on rock.

Detailed explanation-3: -Sometimes when an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil. This fossil is called a cast fossil. The fossilized imprint is called a mold fossil.

Detailed explanation-4: -This empty space is called a mold. A mold shows the original shape and surface of the organism or part. Sometimes, sand or mud fills a mold and hardens, forming a cast of the original organism or part. A cast is a replica of the original organism.

Detailed explanation-5: -What are casts and molds? Casts and molds are types of fossilization where the physical characteristics of organisms are impressed onto rocks, especially coarse porous rocks such as sandstones.