Preprint of new Caddo bottle morphology study available on SocArXiv

This analysis adduces 72 Caddo bottles from 19 sites to test the hypothesis of distinct bottle morphologies associated with sites north and south of the shape boundary from within the spatial extent of the preceding Fourche Maline and Mossy Grove culture areas. The analysis was followed by additional tests to identify whether a difference in Formative/Early and Late/Historic Caddo bottle shapes occurs between and among the northern and southern Caddo groups in the southern Caddo area. Other tests include whether bottle shape varies with size, whether the null hypothesis of parallel slopes for Formative/Early and Late/Historic Caddo bottles is supported or rejected, and whether any group displays greater shape or size variation among individuals relative to other groups.

***  Download the preprint here. Figures and tables can be downloaded by clicking on “Supplementary Materials.”  ***

I extend my gratitude to the Caddo Nation of Oklahoma, the Material Sciences Laboratory at Southern Methodist University, the Williamson Museum at Northwestern State University, the Louisiana State Exhibit Museum, the Texas Archeological Research Laboratory at The University of Texas at Austin, and the Louisiana State University Museum of Natural Science for the requisite permissions, access, and space needed to generate 3D scans of Caddo bottles. Thanks also to Dean C. Adams, Emma Sherratt, Michael J. Shott, Hiram F. (Pete) Gregory, B. Sunday Eiselt, Julian A. Sitters, and Kersten Bergstrom for their constructive criticisms, comments, and suggestions throughout the development of this research design; to the editors for their invitation to submit this chapter; and the anonymous reviewers whose comments improved the manuscript. Development of the analytical work flow and production of 3D scans from the Clarence H. Webb collection was funded by a grant to RZS (P14AP00138) from the National Center for Preservation Technology and Training. Production of 3D scan data for Hickory Engraved and Smithport Plain bottles from the Texas Archeological Research Laboratory was funded by a grant from the Texas Archeological Society, and the production of 3D scan data for previously repatriated Caddo bottles was funded by a grant from the Caddo Nation of Oklahoma.

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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

Preprint available for study of Gahagan biface morphology

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. View and download the preprint here, or by clicking on the image below.

Abstract

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.

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robert z selden jr, computer aided inspection, human mandible, sudan, ct scan, 3d scan, 3d model, 3d surface model, nurbs, deviation, geomagic design x, geomagic control x, sudan, university of colorado boulder, heritage, culture, geometric morphometrics

Advanced 3D Imaging and Morphometrics for Archaeologists

I will be teaching a section of the National Center for Preservation Technology and Training’s Advanced 3D Imaging and Morphometrics for Archaeologists workshop from October 15 – 18, 2018 in the Conservation Laboratory at the Arizona State Museum, on the campus of the University of Arizona.

Other instructors include Bernard K. Means, Loren Davis, and Michael Shott who will be discussing public archaeology and outreach, 3D projectile point analysis, and theory and methods, respectively.

robert z selden jr, archaeology, archeology, geometric morphometric, ceramic, analysis, mathematics, statistics, 3d, 3d scan

The objective of this workshop is to share and discuss the latest uses of 3D imaging of archaeological artifacts in order to improve the utility and precision of analyses that employ 3D data to assess morphological variation. Additional discussions will cover topics related to digital curation and public archaeology, where the utility of 3D scans reach beyond traditional analyses. To accomplish this, we are bringing together selected experts to one location to share their expertise. This four-day event will include lectures, a hands-on practicum, data analysis demonstrations, and discussions of best practices and data curation.

robert z selden jr, caddo, archaeology, ceramic, pot, pottery, geometric morphometrics, shape, size, form, allometry, asymmetry, geomagic design x, culture, heritage, history, museum studies

Find more information, and to register to attend the workshop, click here or follow this link – https://www.ncptt.nps.gov/events/advanced-3d-imaging-and-morphometrics-for-archeologists/.

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robert z selden jr, blackwater draw, clovis, agate basin, 3d, 3d scan, 3d model, projectile point, dart point, new mexico, culture, history, prehistory, heritage

3D Scan Data for Selected Artifacts from Blackwater Draw National Historic Landmark

Between February 8-11, 2016, selected artifacts from the Blackwater Draw National Historic Landmark (LA3324) were scanned in advance of a grant proposal to digitally aggregate the Clovis-era artifacts from the Clovis type site. These data were collected using a NextEngineHD running ScanStudioHD Pro, and post-processed in Geomagic Design X 2016.0.1. All data associated with this project are publicly available (open access) and accessible in Zenodo under a Creative Commons Attribution license, where they can be downloaded for use in additional projects and learning activities. These data have the capacity to augment a variety of research designs spanning the digital humanities, applications of geometric morphometrics, and many others. Additionally, these scans will augment a wide range of comparative research topics throughout the Americas and beyond. Reuse potential for these data is significant.

Unprocessed 3D data are included on the landing page, and links to the processed files are included in the data paper. Download the data paper here:: 3D Scan Data for Selected Artifacts from Blackwater Draw National Historic Landmark

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robert z selden jr, gault, clovis, 3d, 3d scan, 3d model, projectile point, dart point, texas, culture, history, prehistory, heritage

3D Scan Data for Selected Clovis-Age Artifacts from the Gault Site (41BL323)

On August 19, 2016, selected Clovis artifacts from the Gault site (41BL323) were scanned in advance of a large collaborative research project. These data were collected using a NextEngineHD running ScanStudioHD Pro, and were post-processed in Geomagic Design X 2016.0.1. All data associated with this project have been made publicly available (open access) and are accessible in Zenodo under a Creative Commons Attribution license, where they can be downloaded for use in additional projects and learning activities. These data have the capacity to augment a variety of research designs spanning the digital humanities, applications of geometric morphometrics, and many others. Additionally, these scans will augment a wide range of comparative research topics throughout the Americas and beyond. Reuse potential for these data is significant.

Unprocessed 3D data are included on the landing page, and links to the processed files are included in the data paper. Download the data paper here: 3D Scan Data for Selected Clovis-Age Artifacts from the Gault Site (41BL323)

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