On May 18, 1980, Mt. St. Helens erupted. This volcano in Washington state completely changed our thinking on how long it takes for some geologic processes to happen.
Canyons don’t require millions of years to form with a river slowly carving away the rock. The Grand Canyon is evidence of what a lot of water over a short period of time can do.
Creation scientists believe that most of the world’s canyons formed at the end of, or sometime soon after, the flood. The Grand Canyon was no exception.