Hello, Stewart, and welcome to EvC!
You say:
Possibly, but i would assert that it all depends on conditions...
I've seen experiments with sediment in flumes where sand reaches angles of > 30 degrees.
And I'm sure that such experiments have been done. But I don't think that you'll find many flumes supplied with sand-laden sediment out in nature. And, if I remember this thread right, we were specifically talking about the Coconino Sandstone, where other evidence, like animal tracks and etching of grains, points to being wind-laid.
And don't accuse geologists of "assuming a mechanism" when they've communally spent the last 180 years or so elucidating mechanisms. Remember, those gentleman-geologist guys in England started out supporting a world flood. It was the observations and experiments that they themselves did that proved it to be mythical.
Edited by Coragyps, : No reason given.
Edited by Coragyps, : fix same tag twice
"The wretched world lies now under the tyranny of foolishness; things are believed by Christians of such absurdity as no one ever could aforetime induce the heathen to believe." - Agobard of Lyons,
ca. 830 AD