Yes it is an incised river canyon.
Basin
canyons
no
yes
a canyon
Yes, there is limestone in the Grand Canyon. It is primarily found in the form of the Redwall Limestone layer, which is one of the prominent rock layers in the canyon.
wind cannot form canyons but it can shape an carve through them.
a volcano does.
it is a gourge!!!! and it is also a solid
acid rain.
erosion