What is a Mold Fossil ? A Mold Fossil is a fossilised impression made in the substrate, a negative image of the organism. How Are Mold Fossils Formed ? Mold fossils form after hard parts have been buried in mud, clay, or other material that turns to stone. Later, water dissolves the buried hard part, leaving only an impression or mold of the original. The content can get compressed into a hard copy of what it was enclosed in.  |
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