The formation at the uppermost part of this Colorado River Basin formation
are tectonic uplifts as a result of the exposure of the rocks present in the
area.
It stretches as far as 100 miles and is located in two parks known as
The layers from the Mesozoic and Cenozoic Eras are not present in the
layers seen at the Grand Canyon as a result of new rocks being formed on
top of the eroded ones over time.
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