[Bob Kontak]

I ran into several stashes of sourdough mix that were ancient but still in play in Alaska. They weren't really ancient but they saved a bit of the mix from the last batch and rolled it into the new batch and had done this for decades.

FWIW Sourdough was what they called experienced prospectors out west and up into Canada. I'm certain it includes Alaska as I heard the term plenty when I lived up there.

Cheechako was what they called noobs in Alaskan in mining districts.