robert z selden jr, caddo, archaeology, biface, george c davis, caddo mounds state historic site, nagpra, museum studies, lithic, stone tool, archaeology, culture heritage, cultural heritage, history

Lithic morphological organisation: Gahagan bifaces from the Southern Caddo Area

New paper in-press at Digital Applications in Archaeology and Cultural Heritage with John Dockall and Harry Shafer on the morphological variability of Gahagan bifaces –


This analysis of Gahagan biface morphology enlists the three largest samples of Gahagan bifaces, to include that of the type site (Gahagan Mound) as well as the Mounds Plantation and George C. Davis sites. Results indicate a significant difference in Gahagan biface morphology at the Mounds Plantation site when compared with Gahagan bifaces from the Gahagan Mound and George C. Davis sites. Tests for allometry and asymmetry were not significant. The test of morphological disparity indicates that Gahagan bifaces produced at the Mounds Plantation site occupy a more restricted range of morphospace than those produced at Gahagan Mound, providing evidence for standardisation and diversity in Caddo biface production. While the sample includes a wide range of variability, the test of morphological integration indicates that Gahagan bifaces are significantly integrated, meaning that those traits used to characterise their shape (blade and base) vary in a coordinated manner. These results articulate with a shift in Caddo bottle morphology over the same geography, potentially indicating two previously unrecognised and morphologically-distinct lithic and ceramic production areas.



Written by zselden

I am a research associate in the Center for Regional Heritage Research at Stephen F. Austin State University, where my work is focused at the confluence of archaeology, art, engineering, computer science, and the humanities. I am particularly interested in the application of 3D technologies to archaeological problems, geometric morphometrics, network analyses, archaeological theory, and archaeological science.