3 ms·
Obsidian gets around: https://journals.plos.org/plosone/article/figure?id=10.1371/journal.pone.0250840.g004 https://journals.plos.org/plosone/article/figure?id=
by davidw 5y ago
Obsidian gets around: https://journals.plos.org/plosone/article/figure?id=10.1371/journal.pone.0250840.g004 https://journals.plos.org/plosone/article/figure?id=10.1371/...
- dboreham 5y agoThere are also examples of obsidian from a cliff in Yellowstone showing up as artifacts in the mid-west.