The formation of the Grand Canyon was accomplished by the constant erosion of the rock by the Colorado River over some 17 million years. Over time the river was able to carve a very deep channel into the Colorado Plateau. Links are provided to specifics regarding the geology of the Grand Canyon.
Erosion and Eroding by water, wind, etc...
Typically by water erosion.
Both wind and water erosion.
water and wether
water flowing along a river
Erosion
Wind
What
Water
small stuff
Erosion
Valleys.
erosion
In many cases, rivers are responsible for cutting valleys and canyons.
That is the correct spelling of the plural noun "canyons" (mountain valleys).
Canyons and valleys are typically formed by the erosion of rock and sediment by water, wind, or ice over long periods of time. They can also be created by tectonic activity, such as the shifting of Earth's crust along fault lines. Additionally, volcanic activity can form canyons and valleys as lava flows and subsequent erosion shape the landscape.
Pluto has only been observed from orbit, so we don't know for sure, but it does appear from photos that there are valleys and canyons.
How valleys are made
v
deep sea canyons