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

Organic Traps

Whole organisms may become trapped and preserved in amber, natural asphalt, or peat (decaying organic matter). Amber is the fossilized remaining part of tree sap. When sap first flows from the tree, it is very thick and sticky, so as it runs down the trunk, it may trap insects, spiders, and occasionally larger animals such as lizards. These organisms can be preserved for millions of years with details of their soft tissue, such as muscles and hair-like bristles, still intact.