You may not appreciate this, but the few remaining scientists here will. Or you trying to drive the last of us away too?
This post deals with finally answering a question that has been bugging archaeologists and prehistorians, not to mention glacial geologists and a lot of other specialists, for decades.
Quite literally the gold miners in Morgan and Brown counties Indiana moved on to California BEFORE gold was discovered at Sutter's Mill (formerly the centerpoint of the Russian colony in California).
They were there to take advantage of that discovery INSTANTLY. I've suspected for a long time that they'd already found placer deposits (similar to what they'd worked in Indiana and Ohio) in Diamond County and simply kept things quiet.
Of Note: Not all the gold miners left Indiana. Many of them stayed in the area and took advantage of the white oak forests to create a serious basket industry.