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How is an index fossil used in geological dating?
A)
An index fossil is used in radiometric dating as a point of reference in
dating rock layers.
B
An index fossil contains a known quantity of daughter isotope used to date
with certainty, a particular layer of rock.
An index fossil is a distinctive, abundant fossil characteristic of a particular
span of geologic time and used in relative dating.
An index fossil is a rare, geographically isolated fossil only found in a very
narrow time range, used to provide absolute ages of fossils found in the
same layer.
D)
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