slgwv's photos with the keyword: Virgin Canyon

Lake Mead, Arizona-Nevada, USA. Looking west. Arizona on the left, Nevada on the right.

Lake Mead, USA, looking toward the Nevada side. As the reservoir filled, here and there the slopes of the surrounding canyon failed as they got soaked. I don't know the timescale offhand--I suspect they're still slowly sliding, but that most of the motion happened soon after the ground first got saturated. It's an example of geologic consequences from human activity! ;) Btw, with the current drought the lake in this area has pretty much returned to the original river channel.

More of the same.