Caleb D. Swanson #fundie creationconversations.com
The Grand Canyon's sedimentary rock layers are horizontal and even, if there were to be millions of years the layers would not be even because after a layer is layed down, it starts eroding, which does not leave a horizontal surface. So there is a problem with millions of years because the layers are horizontal and a catastrophic flood fits perfectly into the Grand Canyon because layers rapidly layed down would leave a horizontal layers! So the biblical flood must be true.