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Gramadal canyon. The morphology of this canyon suggests that it formed in one or more rapid catastrophic discharges of water, which excavated the substrate.
Harpers Corner, Dinosaur National Monument --- At the floor of these canyons of the Colorado Plateau run the Green and Yampa Rivers.
Badlands, Wasatch Formation, Rt.13 north of Rifle --- The sandstone has been eroded into badlands and teepee-shaped mounds.
Entrenched meander, Steamboat Rock at Harpers Corner, Dinosaur N.M.
Honeycomb weathering, Mesa Verde Fm, Rt.139 north of Grand Junction --- Freezing and thawing of wet sandstone cliffs loosens the sand grains that are then blown away by the wind.