Canyon types:

1. Slot canyons: Narrow corridors formed by the wear of water rushing
through rock. A slot canyon is significantly deeper than it is wide. Some
measure less than a few feet across by drop several hundred feet to the
floor.
2. Plateau canyons: plateau canyons begin with fast-moving rivers that cut
deep into the river over time. The water forms them are powerful, but does
not come and go quickly like flash floods cuts into the rock, wearing it
down deeper and deeper. The harder the rock, the steeper the canyon.
Softener rock results in walls that erode more quickly, creating a wider
canyon that can be deep but no steep.