Why are index fossils used to date other fossils in an area of rock

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asked Apr 6, 2017 168k views

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Pedrostanaka · Answer 1 · 2017-04-11T16:02:48+0000

Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found inrock layers. Trilobites and Graptolites are index fossils.

Why are index fossils used to date other fossils in an area of rock

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