How do trace fossils and index fossils differ?
Trace fossils are any evidences that an organism existed, including footprints, trails, burrows, chemical marker, and fossilized dung. Index fossils are those that are only found in a specific range of geologic time, and are used to quickly determine the age of a sedimentary rock sample. ChaCha!
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About Fossils
A fossil is an organism that once was alive but now is preserved in another mineral or chemical form. The name comes from the Latin word 'fossus.'
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