Pattern and Allometric Measurement of Reduction in Experimental Folsom Bifaces

Abstract Many stone took are reduced during use. Degree and pattern of reduction influence tool size and form, complicating typological assignment but allowing measurement and analysis of curation. We apply simple allometric reduction measures-ratios of changing length, mass or surface area to essentially constant thickness—to a set of experimental Folsom bifaces that were used at dart points and reworked and reduced during use. All measures correlate with degree of reduction from known original size; the simple ratio of length to thickness (L/T) correlates best and distinguishes between earlier and later episodes of use and reduction. Although calibrating variation in allometric reduction measures to common scales remains a challenge, ratios calculated from easily measured dimensions of archaeological tools track the amount and direction of reduction that the tools experienced. Reduction produces patterned distributions; it can be measured in retouched archaeological specimens.

[1]  D'arcy W. Thompson.  On Growth and Form , 1945 .

[2]  R. Towner,et al.  Projectile Point Rejuvenation: A Technological Analysis , 1990 .

[3]  R. Crompton,et al.  Allometry and multidimensional form in Acheulean bifaces from Kilombe, Kenya , 1993 .

[4]  D. J. Meltzer,et al.  The Folsom (Paleoindian) Type Site: Past Investigations, Current Studies , 2002, American Antiquity.

[5]  K. Weedman.  An ethnoarchaeological study of stone scrapers among the Gamo people of southern Ethiopia , 2000 .

[6]  Heidi Knecht,et al.  Projectile Points of Bone, Antler, and Stone Experimental Explorations of Manufacture and Use , 1997 .

[7]  C. M. Barton.  Stone Tools and Paleolithic Settlement in the Iberian Peninsula , 1990, Proceedings of the Prehistoric Society.

[8]  H. Knecht.  Projectile Points of Bone, Antler, and Stone , 1997 .

[9]  Michael J. Shott,et al.  Weibull Estimation on Use Life Distribution in Experimental Spear-Point Data , 2002 .

[10]  Michael F. Rondeau,et al.  When Is an Elko , 1996 .

[11]  C. Ellis.  Understanding "Clovis" Fluted Point Variability in the Northeast: A Perspective from the Debert Site, Nova Scotia , 2004 .

[12]  J. E. Granger.  Meadowood phase settlement pattern in the Niagara frontier region of western New York State , 1978 .

[13]  Michael Shott,et al.  Biface Reduction and the Measurement of Dalton Curation: A Southeastern United States Case Study , 2007, American Antiquity.

[14]  K. Weedman,et al.  On the Spur of the Moment: Effects of Age and Experience on Hafted Stone Scraper Morphology , 2002, American Antiquity.

[15]  George H. Odell,et al.  Experiments with Spears and Arrows on Animal Targets , 1986 .

[16]  H. Dibble.  Middle paleolithic scraper reduction: Background, clarification, and review of the evidence to date , 1995 .

[17]  Peter Hiscock,et al.  Early Australian implement variation: a reduction model , 2003 .

[18]  Stanley A. Ahler,et al.  Why flute : Folsom point design and adaptation , 2000 .

[19]  N. Toth,et al.  An Experimental Investigation into the Nature of Faceted Limestone “Spheroids” in the Early Palaeolithic , 1997 .

[20]  William Andrefsky,et al.  Experimental and Archaeological Verification of an Index of Retouch for Hafted Bifaces , 2006, American Antiquity.

[21]  Michael J. Shott,et al.  Modeling Use-Life Distributions in Archaeology Using New Guinea Wola Ethnographic Data , 2004, American Antiquity.

[22]  Michael J. Shott,et al.  Measuring reduction in stone tools: an ethnoarchaeological study of Gamo hidescrapers from Ethiopia , 2007 .

[23]  William Andrefsky.  Thoughts on Stone Tool Shape and Inferred Function , 1997 .

[24]  Shannon P. McPherron,et al.  Ovate and pointed handaxe assemblages: Two points make a line , 1999 .

[25]  Jeffrey Flenniken,et al.  Typology, Technology, and Chronology of Great Basin Dart Points , 1989 .

[26]  Robert L. Kelly,et al.  Coming into the Country: Early Paleoindian Hunting and Mobility , 1988, American Antiquity.

[27]  Michael J. Shott,et al.  An Exegesis of the Curation Concept , 1996, Journal of Anthropological Research.

[28]  John E. Dockall.  Wear Traces and Projectile Impact: A Review of the Experimental and Archaeological Evidence , 1997 .

[29]  Briggs Buchanan,et al.  An analysis of Folsom projectile point resharpening using quantitative comparisons of form and allometry , 2006 .

[30]  R. Musil.  Functional Efficiency and Technological Change: a Hafting Tradition Model for Prehistoric North America , 1988 .

[31]  C. Clarkson,et al.  Measuring artefact reduction: an examination of Kuhn's Geometric Index of Reduction , 2005 .

[32]  Michael J. Shott,et al.  How much is a scraper? Curation, use rates, and the formation of scraper assemblages , 1995 .

[33]  Albert C. Goodyear,et al.  Tool Kit Entropy and Bipolar Reduction: A Study of Interassemblage Lithic Variability among Paleo-Indian Sites in the Northeastern United States , 1993 .

[34]  C. Ellis.  Paleo-Indian lithic technological structure and organization in the lower Great Lakes area : a first opproximation , 1984 .

[35]  Jason M. LaBelle.  Bison hunting at Cooper Site: Where lightning bolts drew thundering herds , 2000 .

[36]  B. Blades.  End Scraper Reduction and Hunter-Gatherer Mobility , 2003, American Antiquity.

[37]  C. Clarkson.  An Index of Invasiveness for the Measurement of Unifacial and Bifacial Retouch: A Theoretical, Experimental and Archaeological Verification , 2002 .

[38]  C. Clarkson,et al.  Lithics down under: Australian perspectives on lithic reduction, use and classification , 2005 .

[39]  Michael J. Shott,et al.  Use life and curation in New Guinea experimental used flakes , 2005 .

[40]  Steven L. Kuhn,et al.  A geometric index of reduction for unifacial stone tools , 1990 .

[41]  C. Beck.  Functional Attributes and the Differential Persistence of Great Basin Dart Forms , 1995 .

[42]  Steven L. Kuhn,et al.  Defining and measuring reduction in unifacial stone tools , 2005 .