salt diapir origin is now discounted as impact evidence has been found here.
short description here of this package of rocks. I have been scratching my head for years about these sand bodies exposed along the river. On the bottom, they are obviously river channels cut into the underlying strata. But how a lens shaped body of sand was then preserved beneath arch-up strata is curious to me. How could this have formed? Any suggestions?
STA SA 89+50
D. C.C. & P. R.R.
May 4, 1889
The Denver and Colorado Canyons & Pacific Railroad was the brainchild of Frank M. Brown of Denver, who wanted to ship Colorado coal to California via a railroad that would follow the Colorado River. Brown lost his life in Soap Creek Rapid in Grand Canyon two months after this inscription was made.
Big Drop 2 on the Colorado River