How might a numerical date for a layer of sedimentary rock be determined? a. One

Question

How might a numerical date for a layer of sedimentary rock be determined?

a. One or more igneous bodies near the sedimentary rock layer are radiometrically dated; the sedimentary rock layer is always younger than the igneous rock, regardless of its placement.

b. One or more igneous bodies near the sedimentary rock layer are radiometrically dated; the sedimentary rock layer is always older than the igneous rock, regardless of its placement.

c. All of the different grain types in the sedimentary layer are radiometrically dated, and the average of these results determines the age of the layer.

d. The order of occurrence of the sedimentary layer is related to a local igneous body that has been radiometrically dated, thus yielding an age range for the sedimentary layer.

e. The order of occurrence of the sedimentary layer is related to a local metamorphic rock that has been radiometrically dated, thus yielding an age range for the sedimentary layer.

Explanation / Answer

The order of occurrence of the sedimentary layer is related to a local igneous body that has been radiometrically dated, thus yielding an age range for the sedimentary layer.

Sedimentary and metamorphic rocks can not be dated radiometrically

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