I have always thought about this. How did our ancestors find salt and metal? Did someone just choose a spot to dig and go at it?
In: Planetary Science
It’s important to remember the state of the world now is not what it was then. The only reason we don’t have metal veins literally sticking up through the ground surface is because we mined all of those easy mines. We basically mined everything that starts half a mile or less under the ground at this point*, but our ancestors didn’t have to contend with that. Most veins were either plainly visible, or left telltale sins for prospectors to spot.
*: Estimate, I have no idea the real number but it’s getting deeper every year for common stuff like copper and iron
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