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Miscellaneous Studies in Hard-Hammer Percussion Flaking: The Effects of Oblique Impact

Published online by Cambridge University Press:  20 January 2017

John D. Speth
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Abstract

Steel balls were dropped on to massive glass prisms at an impact angle of 45° in order to determine the effects of oblique impact on several attributes of flake size and flake shape. The results indicate that a flake produced by oblique impact is shorter, but not significantly thinner (except in the immediate area of the cone), than a flake of comparable platform thickness produced by vertical impact.

Type
Reports
Information
American Antiquity , Volume 40 , Issue 2Part1 , April 1975 , pp. 203 - 207
Copyright
Copyright © The Society for American Archaeology 1975

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References

Lawn, B. R. 1967 Partial cone crack formation in a brittle material loaded with a sliding spherical in- denter. Royal Society, Proceedings 299A:307-316.Google Scholar
Speth, John D. 1972 Mechanical basis of percussion flaking. American Antiquity 37:34-60.Google Scholar
Speth, John 1974 Experimental investigations of hard-hammer percussion flaking. Tebiwa (in press).Google Scholar