conchoidal fracture is made out of brittle breaking rock materials such as flint chert and obsidian.
made out of brittle breaking rock materials such as flint chert and obsidian?
conchoidal fracture
conchoidal fracture





























conchoidal fracture describes the way that brittle materials break or fracture when they do not follow any natural planes of separation. mindat.org defines conchoidal fracture as follows "a fracture with smooth, curved surfaces, typically slightly concave, showing concentric undulations resembling the lines of growth of a shell". materials that break in this way include quartz, chert, flint, quartzite, jasper, and other fine-grained or amorphous materials with a composition of pure silica, such as obsidian and window glass, as well as a few metals, such as solid gallium.
conchoidal fracture
although the maya had projectile technology, such as the atlatl and spear, much of the actual fighting was done at close range with "thrusting, stabbing, and crushing". weapons were crafted mostly from obsidian and chert, obsidian being the sharpest (but more brittle). knapping chert or obsidian into bifacial projectile points and attaching them to atlatl darts, spears, and arrows was the dominant technology. although bows and arrows were used, spears and macuahuitl remained much more common. as well, chipped flint was common in close range combat knives.





























section::::archaeological sites with evidence of warfare.





























section::::archaeological sites with evidence of warfare.:mayapan.
maya warfare