May I relate an experience while traveling down a tributary to the salt river. I came to an area that looked solid & after leaping from a rock I found myself chest deep in quick sand & strapped with a 80 lb back pack. Thank GOD there were two back packers with me. This area had over 2 feet of black sands & I could never find bed rock. The surrounding area did produce some amazing archaeological finds. Back than it was not a called a so called wilderness area. BLESS YOUR HEARTS