Richard Warren, Research Associate in Dendrochronology, received a B.A. degree in Anthropology from The University of Arizona in 1962 and has been at the Laboratory since 1964. Warren is the most experienced and accomplished dendrochronological technician in the world, maintaining unmatched high rates of analytical speed, accuracy, and reliability. He developed and honed his tree-ring skills as a principal analytical contributor to the Dendrochronology of Southwestern United States Project, an NSF-sponsored reanalysis of the LTRR’s archaeological tree-ring sample holdings that extended from 1963 through 1975. Since that time, he has been responsible for numerous archaeological assignments and has participated in many field collection operations including archaeological sampling with the Three-Mile Draw, Tsegi, Chetro Ketl, Walpi, and Acoma projects and living-tree coring for several phases of the Southwest Paleoclimate project. Through the years, he has served as a general dating “troubleshooter” for the LTRR, providing chronological quality control for a wide range of research projects involving several principal investigators. In addition to archaeological dating, his experience includes analyzing bristlecone pine samples, dating and measuring living-tree samples for dendroclimatic analysis, constructing long tree-ring chronologies for Alaska and the Southwest, geological tree-ring dating, preparing samples for non-dendrochronological analysis, and checking other technicians’ crossdating and chronology construction. He also assisted in teaching laboratory sections of the Introduction to Dendrochronology course, delivering lectures to visiting groups, and guiding tours of the Laboratory. Finally, he supervised the LTRR’s shop, maintaining and repairing equipment, requisitioning supplies, training individuals in the use of shop machines, and ensuring a safe working environment for the users of this facility. Warren officially retired from the University in 2004 but continues to work half-time in the archaeological dating program.
During the last seven years, Warren analyzed 8,833 archaeological and living-tree tree-ring samples and derived 3,067 dates. During this period, he reanalyzed the Harvard Peabody Museum’s tree-ring sample collection from Awatovi, a large prehistoric-historic period Hopi site in northern Arizona. Major accomplishments include: analyzing archaeological tree-ring samples from sites in northern Sonora; the production of dates that illuminate the prehistory and history of the Four Corners area, the Navajo homeland in Dinétah, the Upper Pecos River Valley, northern Colorado, and central New Mexico; preparing dated wood samples for exhibits at several museums and Park Service facilities; analysis of wood samples designed to characterize the environmental history of the Mesa Verde National Park pinyon-juniper woodland over the last 500 years; and checking the dating of samples for research projects directed by J. S. Dean, R. H. Towner, I. Panyushkina, and L. N. Ababneh.