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History, 20.12.2019 19:31 rocio5649

The calico scallop is an index fossil. it is well documented to have lived 1.8 million years ago. therefore, the approximate age of the rock in which this fossil is found is
a. 0.9 million years.
b. 1.8 million years.
c. 3.6 million years.
d. 5.4 million years.

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