I'm just now catching up in this thread, this is from something you posted a few days ago:
Of course, and we have discussed this once before, remember ? I had given you a link which had the angle of repose of wet sand at 25 degrees, the exact angle the coconino sand dunes are at. (While desert sand dunes would produce angles of 34 degrees)
When I build sand castles I can get an angle of repose of wet sand of 90 degrees and even greater. When you said wet sand, did you mean completely submerged sand under water?
Your reference is locked behind a paydoor. If you provide more information perhaps it can be found elsewhere.
Coupled with the fact that sand dunes produce an angle of 34degrees, not 25, and I am befuddled by the fact you still cling on to any of this because of your unpublished back-yard experiment.
Now I'm getting confused. Weren't you arguing that fossil sand dunes found in places like the Coconino Sandstone layer of the Grand Canyon were actually formed underwater? And isn't the angle of sand dunes in that layer up to 34 degrees? And aren't you arguing that submerged sand dunes can only have angles up to 30 degrees? Doesn't that rule out a submerged origin for the Coconino layer?