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index fossil
noun as in trace fossil
Weak matches
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Example Sentences
In other cases, researchers can date fossilized remains using nearby “index fossils” of species known to have existed during a specific narrow time frame.
From Scientific American
The grounds were often more interesting than the matches, the All England Lawn Tennis and Croquet Club being such an index fossil from the nineteenth century.
From The New Yorker
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From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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