When I've given knapping demos using obsidian and inadvertently nicked myself with little obsidian flakes, they're so sharp that I usually didn't notice I was bleeding until I smeared blood all over myself - this made knapping look pretty bad-ass to at least one group of sixth graders I once gave a demo to.īut don't take my word for it! Lithic specialists often refer to the story of Don Crabtree (one of the people directly responsible for the rebirth of knapping in the 60's and 70's) insisting that he be operated on by surgeons using scalpels tipped with obsidian blades he had expressly knapped for the purpose. Well, that bloody geyser was unleashed by a flake of coarse flint - and obsidian is much, much sharper than that. Just how sharp is obsidian? Extremely damn frikkin' sharp! I often regale students about the first time I knapped stone myself, a sad, sordid story that ends with a fountain of blood gushing from the tip of my index finger (not that I would ever exaggerate for dramatic effect or anything). Whenever it was available, obsidian seems to have been one of the preferred materials to make sharp flakes of, mainly because it is incomparably sharp among lithic raw materials! See, most of my analytical work has been focused on stone tools (aka lithics) and how they were manufactured, used and managed by people in the past. In my recent post on #hipsterscience, the quote that struck closest to home was the one about the obsidian blade.
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