Which of the following is a correct assumption about the age of the rock layers

Question

Which of the following is a correct assumption about the age of the rock layers in the Grand Canyon?

           The sedimentary rock layers at the rim of the canyon are older than the metamorphic layers at the bottom of the canyon.                     The sedimentary rock layers in the middle of the canyon are older than the metamorphic rock layers at the bottom and sedimentary rocks at the rim of the canyon.                     The sedimentary rock layers were originally deposited vertically and later turned horizontally.                     The metamorphic rock layers at the bottom of the canyon are older than the sedimentary layers at the rim of the canyon.                     All of the rock layers in the Grand Canyon are the same age.

Explanation / Answer

The metamorphic rock layers at the bottom of the canyon are older than the sedimentary layers at the rim of the canyon. is correct assumption

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