Which correctly lists three different geologic features that help scientists determine the relative ages of rocks by their positions?
magma, erosion, and intrusions
erosion, magma, and cross-cutting relationships
intrusions, index fossils, and magma
index fossils, intrusions, and cross-cutting relationships
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A geologist finds four layers of sedimentary rock. She determines that no geologic events have shifted the layers. She labels the layers A, B, C, and D from the top to the bottom.
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were is the answer
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