How do exposed layers of sedimentary rock in the Grand Canyon reveal clues about the geologic time scale? A) The chemical composition of each layer indicates the conditions on Earth when the layer was deposited. B) Fossils of soft-bodied animals are prevalent in sedimentary rock. C) Radiometric dating using ¹⁴C of fossils in each layer can accurately predict their age up to 1 million years ago. D) The chemical composition of each layer can be determined by radiometric dating. E) The oldest fossils are found near the surface, while the most recent fossils are found at deeper layers.

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The layers of sedimentary rock in the Grand Canyon reveal clues about the geologic time scale because the chemical composition of each layer indicates the conditions on Earth when that layer was deposited. This helps scientists understand how Earth's atmosphere, climate, and life forms have changed over time.

How Do Exposed Layers of Sedimentary Rock in the Grand