Finials on stone flakes |
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| Institution: | 1. University of Washington Denny Hall, Box 353100, Seattle, WA 98195-3100, USA;2. The University of Sydney, Sydney, NSW, Australia;3. Huonbrook and Environment and Heritage P/L, PO Box 97, Moruya, NSW 2537, Australia;4. Flinders University, Adelaide, South Australia, Australia;1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, No. 390 Qinghe Road, Jiading District, Shanghai, D.C. 201800, China;2. College of Science, Zhejiang University of Technology, Hangzhou 310023, China;3. Institute of Information Optical Engineering, Soochow University, Suzhou 215006, China;4. Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China |
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| Abstract: | When a conchoidal flake is detached from a stone the fracture can either terminate at a small angle to the stone's surface, creating a feather flake, or turn to end at rightangles, creating a hinge or step flake. If a crack turns towards the surface of the stone its path is unstable, and the crack often turns once again, to propagate parallel to the surface of the stone and form a retroflexion or an inflexion on the end of the flake. The retroflexion on the end of a hinge termination has long been recognized, but the inflexion, and its combination with a retroflexion to form a pseudo-bifurcation, has not. Recognition of these finials is important in use-wear analysis for the accurate identification of the various flake scar types and the determination of stone tool function. |
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