This is a great article about artisanal mining in Africa and the latest technology for mapping paleochannels. It's cool to see the contrast between old and new.
https://www.westcoastplacer.com/searching-for-ancient-rivers-in-west-africa/
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Looks as if the nut itself had a screw seal outer profile. My guess would be for water or air proofing or space age nails haha. Any and all inquiries, thoughts and hypothesis are welcomed! Thanks, Beau Johnson
- dreamer
Looks as if the nut itself had a screw seal outer profile. My guess would be for water or air proofing or space age nails haha. Any and all inquiries, thoughts and hypothesis are welcomed! Thanks, Beau Johnson
- dreamer