everything
A rift valley was caused by tectonic plates moving against each other. This usually occurs during the formation of mountains.
Gravity Thermal convection.
Folding and differential erosion
In cross-section: A 'U' shaped valley is formed from glacial erosion. A 'V' shaped valley is formed by river erosion.
A valley itself cannot cause erosion, but can be hugely affected by erosion. Usually Valley erosion is caused by glaciers, a common agent of erosion.
The Monument Valley is in Utah.
About 121 miles to Monument Valley, AZ.
Geologists think that the Great Rift Valley was caused by violent underground forces. Perhaps underground earthquakes and plate movement.
Monument Valley is located in the Colorado Plateau Desert in the Four Corners region of the United States.
In Utah
Valley of the fallen
1933
NO
in southern utah close to arizona
Monument Valley.
Both Arizona and Utah.
That was Highway 163.