how does it form
how long does it take
It takes millions of years to form a canyon. Cause of weathering it is breaking it down every years and there also different kinds of canyons all around the world to. when it rains on the canyons it leaves strike of lines all around it.
there used to be a big lake around canyons but the water evaporated and took a while like about a few years and that is how the canyon was form also erosion never stops also when rain falls on the canyon the rain is braking the canyon slowly.