One of the claims made by young-earth creationists (YECs) is that the Grand Canyon was formed when the waters of Noah’s flood subsided; a whole lot of water drained off and carved a channel in the rock.
Geologists have known for a long time that this idea is ridiculous. For regular folks like me, though, Google Maps can help illustrate why it’s nonsense.
According to mainstream geologists, the area south of Coulee City was formed by a gigantic flood. To me, this looks kind of like my basement floor after rains and a backed-up drain brought in dirt from outdoors and left rivulets of mud after the water drained away.
To me, this looks quite different from the previous picture. For one thing, the river meanders a lot. It is also surrounded by a fractal pattern of mountains (looks a bit like frost, doesn’t it?), something we don’t see on the Scablands photo.
I’m not a geologist, but to me this looks like what you get in simulations of drainage basins, i.e., when water erodes rock.