Heat-Treating Experiments With Onondaga Chert: Preliminary Results*
نویسنده
چکیده
Heat-treatment in lithic technology refers to the controlled heating of quartz-rich, brittle, elastic lithic materials in order to reduce fracture toughness and improve knapping qualities. Successful heat-treatment reduces the point-tensile strength of many varieties of micro-crystalline quartz, including chert, without perceptibly altering any of the other properties with regard to fracture. This reduction in fracture toughness has tangible benefits to the knapper in terms of the relative ease with which fracture can be accomplished and controlled.
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