The flat-lying sedimentary rocks in the Grand Canyon that record the coming and going of the seas are primarily relative in age.
What created the sedimentary rock in the Grand Canyon?
The Ancient Rocks of Grand Canyon is one that did erode sediments from the environments and it is said to form formed sharp layers of sedimentary rocks.
The relative age of sedimentary rocks exposed in the Grand Canyon and in the Appalachian mountains are due to different factors.
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