Bright Angel Canyon from Yavapai Point; the distinctive linearity of this large tributary to the Colorado is the result of preferential stream erosion along the trace of the Bright Angel Fault, a Late Proterozoic normal formed by extensional tectonics and reactivated as a reverse fault during the Late Cretaceous – Early Tertiary Laramide Orogeny and again as a normal fault during ongoing Basin and Range extension.