In the Precambrian, muds and sands were washed into a shallow inland sea now occupied by the Rocky Mountains. The limestones, shales, and sandstones which accumulated into six distinct formations, each with a conspicuous color variation, are known collectively as the ________.

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The Answer of In the Precambrian, muds and sands were washed into a shallow inland sea now occupied by the Rocky Mountains. The limestones, shales, and sandstones which accumulated into six distinct formations, each with a conspicuous color variation, are known collectively as the ________.

In the Precambrian, Muds and Sands Were Washed into a Shallow