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5 May, 03:56

What determines the length of a geologic time period? A. Fossil record B. Material density C. Meteors and rocks D. Radioactive materials

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  1. 5 May, 06:28
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    A

    Fossil record

    Explanation:

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  2. 5 May, 07:51
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    Answer

    Fossil records determines the length of a geological time period.

    Explanation

    The history of the Earth was divided by geologists using the time intervals arranged in series. These intervals differ in length because they have different events. Using the fossil remains of plants and animal species a boundary between the Permian and Triassic was identified because the fossils indicated that there was elimination of more species of plants and animals.
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