Although igneous rocks are the easiest to date radiometrically, most fossils are preserved in sedimentary rocks.

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Quizplus · Accepted Answer

This is because sedimentary rocks contain layers of sediment that accumulate over time, which can trap and preserve fossils within them. Igneous rocks, on the other hand, form from molten material and do not contain layers of sediment, making it more difficult to find and date fossils within them.

Although Igneous Rocks Are the Easiest to Date Radiometrically, Most