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Filters Date Types (for Date Range) Contacts Laura E Strickland Robert S Thompson Geosciences and Environmental Change Science Center U.S. Geological Survey Ecosystems Lydia A Pinkham Tag Types USGS Scientific Topic Keyword (1) Harvest Set (1) View Results as: JSON ATOM CSV

Digital Archive of the R.S. Thompson Packrat Midden Collection, Version 1.0 This data release provides a digital inventory of the Robert S. Thompson packrat midden collection consisting of 1,740 midden samples and subsamples primarily collected in the Great Basin region of Nevada, as well as in Arizona, California, Colorado, Oklahoma, Utah, and Washington, USA, by Robert S. Thompson (USGS scientist emeritus) and others between 1977 and 2006. Middens are waste piles composed of the urine and feces of packrats (Neotoma spp.) also containing plant materials, bones, and insects. Radiocarbon dating of middens indicates they can be preserved for as long as 50,000 years, and their fossil plant assemblages document changes in plant community composition through time, providing important records... Categories: Data, Data Release - In Progress; Tags: Botany, Climatology, Ecology, USGS Science Data Catalog (SDC)