Zion National Park: Evidence of Deep Water Sand Waves
FRIDAY, APRIL 30, 2021 Brian Thomas, Ph.D., and Tim Clarey, Ph.D.
"...Cross-beds from windblown sand form near the stable slope angle of dry sand at between 32° and 35° from horizontal. In contrast, angles not much greater than 20° indicate that fast-flowing water put the sand there. So, the angle measure of a cross-bed layer reveals whether wind or water formed the original dune.
Our measurements at Zion’s Checkerboard Mesa were all between 17° and 16°—the angle water would have caused. The Navajo Sandstone even has limestone and dolomite mixed with some of the sandstone layers.2 These carbonate minerals form in water. The area was certainly covered in water…”
Ref. Zion National Park: Evidence of Deep Water Sand Waves. Acts & Facts. 50 (5) 2021. Online: www.icr.org/article/12778/
This information can be consistent with deposition of these strata during the Noah Flood Event, and erosion post flooding.