San Diego Archaeological Center

Research Associates

Patrick L. Abbott (Ph.D. Geology, University of Texas at Austin) is Emeritus Professor of Geology at San Diego State University. His research is aimed at reconstructing the history stored in sedimentary rocks and fossils including evidence of ancient depositional environments, paleoclimates, paleogeographies, tectonic histories, provenance, and ancient high-energy events. Dr. Abbott is the author of two books, The Rise and Fall of San Diego (1999, Sunbelt Publications) and Natural Disasters (2011, McGraw-Hill), as well as numerous scientific papers. He has given thousands of television news interviews regarding current geological events.






Jenny L. Adams (Ph.D. Anthropology, University of Arizona) is a Research Archaeologist for Desert Archaeology, Inc. in Tucson, Arizona. Dr. Adams has over 30 years of experience in archaeological fieldwork, laboratory analysis, and data analysis and is a specialist in ground stone studies. Her work has documente
d the development of Hohokam grinding technology in the Tucson Basin as well as the nature of pre-Hohokam era grinding technology. Her publications include a book about how to analyze ground stone artifacts (Ground Stone Analysis: a Technological Approach, University of Utah Press) and numerous articles in edited volumes and journals such as Kiva and Journal of Field Archaeology about use-wear analysis, experimentation with ground stone tools, gendered technological traditions, and the intentional breaking of artifacts.


Jim Cassidy

Jim Cassidy (Ph.D. Anthropology, University of California Santa Barbara) is recently retired from the U.S. Navy as the Southwest Region’s Cultural Resources Program Manager. His work experience includes two years as Archaeologist with the National Park Service at Chaco Canyon and Mesa Verde and seven years with the U.S. Navy/Marine Corps as Archaeologist and Environmental Management Coordinator. Dr. Cassidy has published numerous articles in regional, national and international journals, as well as co-authoring a book on California maritime archaeology. He is active in professional and community organizations and continues to pursue research interests focusing on the maritime prehistory of the coastal areas of southern California and the Baja Peninsula.



G. Timothy Gross (Ph.D. Anthropology, Washington State University) is Adjunct Professor at the University of San Diego and also teaches at San Diego State University and Mesa College. He does consulting work with Ecology and Environment, Inc. Dr. Gross has participated in archaeological projects in the Siwa Oasis region of northwestern Egypt, Colorado, Washington state, and Arizona, as well as southern and central California. He was managing editor for the Dolores Archaeological Program technical report series, including thirteen volumes published by the Bureau of Reclamation on this important archaeological project in southwest Colorado. Dr. Gross is coauthor with Sarah W. Neusius of the book, Seeking Our Past: An Introduction to North American Archaeology (2007, Oxford University Press). He is an expert on lithic tool replication, is a past president of the board of the San Diego Archaeological Center, and has a deep interest in curation issues.


Don Laylander (M.A. Anthropology, San Diego State University) has more than 30 years of professional experience in archaeological fieldwork and laboratory analysis, research, and cultural resource management throughout California. He has discussed and contributed to diverse approaches for reconstructing and interpreting the prehistory of California and Baja California, integrating ethnographic and linguistic as well as archaeological sources of information. Mr. Laylander’s publications include book-length studies on Early Ethnography of the Californias, 1533-1825 (2000), Listening to the Raven: The Southern California Ethnography of Constance Goddard DuBois (2004), and The Prehistory of Baja California: Advances in the Archaeology of the Forgotten Peninsula (edited with Jerry D. Moore; 2006). He has contributed articles to such publications as the Pacific Coast Archaeological Society Quarterly, Journal of California and Great Basin Anthropology, San Diego State University Occasional Archaeological Papers, Memorias: Balances y Perspectivas de la Antropología e Historia de Baja California, and Southern California Quarterly, as well as presenting many unpublished conference papers and creating the webpages “Bajacalifology” and “Research Issues in San Diego Prehistory.” He is currently Editor of the Society for California Archaeology’s annual Proceedings and an Associate Editor of California Archaeology.


Patrick Sean Quinn (Ph.D. Archaeology, University College London, UK) is an archaeological scientist with particular interest in the compositional analysis of ceramics and its potential for the reconstruction of ancient material culture. As a trained geologist (BSc Keele University, UK) and micropalaeontologist (MSc University College London), he applies techniques from the earth sciences to investigate ceramics from several geological regions and archaeological periods, including Minoan Crete, prehistoric Britain and Late Prehistoric California. Dr. Quinn is an expert in thin section ceramic petrography, which he teaches at postgraduate level. Since 2006 Dr. Quinn and Dr. Burton have collaborated on research examining technological and cultural aspects of southern California brown and buff wares. Dr. Quinn has published articles in a variety of scholarly journals including Archaeometry, Geoarchaeology, and the Journal of Micropalaeontology. In 2009 he edited a volume on the application of petrography to archaeological ceramics titled Interpreting Silent Artefacts: Petrographic Approaches to Archaeological Ceramics (Archaeopress) and is currently writing a handbook on the approach.