Wow charlotte49er that is a heaping pile of information, well done! If you don't mind, what source did that come from?............63bkpkr
2 sources. One is a webstie called Iowa Gold
WHERE_TO_FIND_GOLD_USA
They have a page that has information on just about every state and where to find gold.
The other is that, I grew up in Southern Indiana and searched for the Yellar stuff from age 10 until I left the state at 22 years old. (I graduated from Indiana State with Larry Bird!) I thought I found gold playing a creek when I was 10, but turned out to be Pyrite. (But I was hooked, or bitten. LOL)
There's a real good "White Paper" (Research paper) that was done on the Richmond, IN area down to southern Ohio on gold in the Whitewater river. (I never found any, but they say it's there.) LOL It's on my old computer. If I ever hook it back up, I'll pull it off and send or post a copy of it. I can post only if it's not copywrited.
The book on Midwestern Gold you can get on amazon as well from the Midwest Prospector's site.
I'm not sure what the rules are about prospecting in Brown County State Park. I know there is gold in the area. (State parks will run from pans only to pans, sluices and shovels. Depends on the state, and the rangers some times.)
I hope all this helps. Brian