[Boogieman]

Aquatic teeth just laying around loose near the surface? Yeah, something doesn’t sound right there.

If it was uplift, stuff that was loose on the surface (including the sand itself) should have rolled right down to lower elevations).

[skeeter]

Yes, this stuff was on the sides of mountains composed entirely of sand.

Not sandstone, sand.

[thackney]

Erosion of previously covered layer after the uplift.

You have to think in terms of geological time frames.