Bone of an organism is preserved in cast and mold fossils.
What are fossil mold and cast?
- Fossil molds and casts preserve a three-dimensional impression of remains buried in mud.
- Mold is the term for the organism's mineralized imprint that was left in the sediment.
- The mold's mineralized silt fills in the gaps left by the remains, imitating their shape. Cast describes this.
Why is bone preserved?
- An organism has a better chance of being kept when it is buried rapidly since there is less degradation.
- Less likely to become fossils than the hard portions of an organism, such as its bones, shell, and teeth.
- Scavengers typically avoid eating these pieces, which is one explanation for this.
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