guide fossil


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guide fossil

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Noun1.guide fossil - a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is foundguide fossil - a fossil known to have lived in a particular geologic age that can be used to date the rock layer in which it is found
fossil - the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
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