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Genrish500 [490]
3 years ago
11

Which phrases describe organisms that formed index fossils?​

Social Studies
1 answer:
larisa [96]3 years ago
7 0

A good index fossil is one with four characteristics: it is distinctive, widespread, abundant and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms. That being said, certain land organisms are useful in young rocks and specific regions.

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