glacier erosion
Glacier
U-shaped valley. Look at pictures of the Yosemite Valley.
water erosion. :)
Gully Erosion
Glaciers
Glaciers
Abrasion
Glaciers
They are not volcanoes. The Yosemite granite domes are plutons, formed from molten rock that cooled deep underground.
wave
butt hole
Ice Water (river) Mud
The water erosion from the river formed the Grand Canyon over a very, very long time.