Creationist Theory in the Grand Canyon

I was just reading in the Sierra Club Magazine, in the bookshop at the rim of the Grand Canyon, they are selling a book, The Grand Canyon - a Different View. It explains the geology and geomorphology of the Canyon using creationist theory. The idea is that the Canyon cannot be more than a few thousand years old and was formed by the aftermath of Noah's great flood. All the fossils and layers in the canyon are explained as having been buried by the flood and the canyon itself was formed when some natural dam somewhere broke to allow the outflowing water to carve the canyon. So much for progress in this land of ours. Of course, if that were the least of it, it would be fine, but in some states they are teaching these theories in the schools and of course their proponents have a nice website.