Why aren’t there Grand Canyons all over North America?
‘Why aren’t there Grand Canyons all over North America?’
Terrain. Altitude. Type of rock. Pitch of the slope. Vegetation.
If I recall correctly, there were some other geological events that led to the Grand Canyon. Something called an "uplift" of the Colorado Plateau, which I believe translated, "enhanced" the depth of the canyon. I'm sure there were other factors--the relatively softer sandstone made it easier for the river to erode; the eroding sand created an abrasive mix which eroded even more.
The geology of Lake Pend Oreile, In North Idaho indicates that the 1100 foot deep lake was formed by the outflow of massive amounts of water that had been captured behind ice dams during successive ice ages. The water flow gouged out solid bedrock down to 1100+ feet. The alluvial fan spreads for hundreds of miles and formed the Rathdrum plain a hundred miles South. Then there’s the Columbia Gorge, Lake Missoula emptied right through the Cascade mountain range creating a canyon thousands of feet deep on its way to the ocean. They’re there if you know where to look.