The Great Unconformity in the Grand Canyon
The Great Unconformity, then, becomes a powerful visual representation of the type of geological event one would expect to see if there had been a worldwide flood as described in the Bible. One of the places we often explore on our Grand Canyon river trips is a fascinating little side canyon found at river mile 120 called Blacktail Canyon. Blacktail is a very narrow slot canyon, carved predominantly into the golden-brown latticed ledges of the Tapeats Sandstone, a formation known for its striking visual characteristics and its importance in
