Geologic Processes of Evolution

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Carbonization
Petrifaction
Replacement
Recrystallization
Soft-Tissue Preservation
Mummification
Organic Traps
Tar
Peat Moss


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Fossilization Process

Mummification

Mummification is one form of Soft-Tissue Preservation. Mummification may occur in hot, arid climates, which can dehydrate organisms before their soft tissue has decayed fully. The skin itself is preserved for only a short time, but the impressions of the skin in the surrounding sediment can be preserved much longer if the sediment turns to rock. Paleontologists have found skin impressions of dinosaurs preserved by this method.