it hardens and molds the shape
A coal-like residue, bulids up and forms around something to form a fossil. This fossil should be classified as a carbon-film fossil.
When a fossil mold is filled, it forms a fossil cast. The cast is a replica of the original organism or object that created the mold, made of the same material as the original organism or object. Fossil casts are valuable in paleontology for studying the morphology of ancient organisms.
The fossils of the oldest life forms can be found in the Precambrian period of the fossil record.
fossil
Fossil fuels (coal, oil and natural gas).
Fossil records. Next time look in your textbook.
First, a thin layer of sediment hardens and forms a mold. Then, what is known as a cast is when a new layer of sediment fills in the mold breaking down the creature/ animal/fossil.
It was based on fossil evidence
coaloilnatural gas
coal
A fossil mold forms when an organism's remains decay and leave behind an empty space in the rock where it was once located. This empty space can then be filled with minerals to create a fossil cast.
Another kind of fossil is a mold or cast fossil, which forms when an organism's remains decay and leave an impression in the surrounding sediment that is later filled with minerals. Another type is a trace fossil, which is evidence of an organism's activity, like footprints or burrows, preserved in rock.