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What is cast fossil?
A cast fossil is formed when a mold fossil is filled in with minerals or sediments, creating a replica of the original organism. The mold is created when an organism decays or is buried in sediment, leaving an impression behind. Cast fossils can provide valuable information about the shape and structure of the original organism.
Is a cast fossil one kind of carbonized fossil?
No, a cast fossil is not the same as a carbonized fossil. Cast fossils are formed when minerals fill in the cavity left by a previously existing organism, while carbonized fossils are formed when organic materials are compressed and heated, leaving a carbon residue of the original organism. Both types of fossils preserve the shape of the organism, but through different processes.
How does a cast fossil form?
A cast fossil forms when an organism dies and becomes buried in sediment. Over time, the organism's remains decay, leaving behind a cavity or mold in the sediment. The mold is then filled with minerals that harden and create a replica of the organism's shape, known as a cast fossil.
What forms when a fossil mold is filled?
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.
How are mold and cast related?
The Cast is the fossil of the shell etc itself. The Mould is the hollow left in the surrounding rock if the fossil is removed artificially or by some natural event such as differential dissolution or mass-movement.
