[Answer For] Marble Canyon was formed by which river?

The Quiz: Marble Canyon was formed by which river?

A Rio Grande
B Columbia
C Colorado

Beginning about 6 million years ago, the Colorado gradually carved downward through countless layers of sedimentary, igneous, and metamorphic rock to form Marble Canyon. The river and its tributary streams continue to deepen and widen the canyon even today.

The correct answer to this quiz is Colorado.

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