That's too bad. I saw near our local river, a parking area for the trails system and it happens to be right next to this cool interesting white sand I have had my eye on for some time, but where I had noticed it was on someone's property - now I get the chance to scoop up some and just try and understand how we got white sand around here - middle of North America, and near red rocks and brown sands, lol. I have seen a layer in the side of the stream bed off shooting from the river too.
Nature is curious.
Funny thing about the rocks, it it might be the hot new trend somewhere in the world!