Hello Steven and thank you.
My husband has a small dump truck and in addition to getting rocks for our property, I am also allowed to collect from the gravel pit, as we are purchasing there.
I don’t believe my stones are tools. If they have anything to do with Native Americans it would be impossible to tell, really. It just seems odd to me that the chalcedony as I have found it, is already “tumbled” by nature with many of them just seeming to be too perfect or smooth.
All of my speculations are just that; speculations in an attempt to explain what I find to be an incredible amount of different colors, to have all ended up in a gravel pit in Louisiana. I’m sorry but I thought I was clear about what area of the world they came from and where they ended up.
Just one or two loads in a small dump truck of big rock can yield an awful lot of stones. My husband just sort of does it as favors for people we know. We purchase the stones.
However, I can concur with you on the roads. Some of the rocks of which our gravel roads around here are made, and those which are the base in most of our paved roads, would have rocks bought in on containers from other places via train and containers delivered to docks on the Mississippi River, where DOTD would purchase them.
But, around this part of Louisiana, the land becomes mostly clay based in the higher areas, and you can clearly see where road cut thrus and old creek cut throughs have layers of different materials with stones embedded in the layers. So, many of the stones used for the roads, came from local sources. I have picked up one or two specimens from roadways and ditches which turned out to be beautiful.
And too, we humans and science in particular, don’t know everything about earth’s history yet. All scientfically based things are possible.
I love information like you and others have given. Maybe I should have been a geologist. 