USGS North American Packrat Midden Database, Version 5.0: number of middens compared with radiocarbon years
Detailed Description
Chart showing number of dated midden samples occurring in each 1,000-year (calibrated radiocarbon) interval recorded in the USGS North American Packrat Midden Database, Version 5.0.
Sources/Usage
Public Domain.
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USGS North American Packrat Midden Database
A Database of Paleoecological Records from Neotoma Middens in Western North America Dry caves and rockshelters in western North American host a unique and valuable paleobotanical resource known as packrat middens. Packrat ( Neotoma spp.) middens composed of desiccated fecal matter and urine also contain well preserved fossil plant materials. Over fifty years of scientific investigations on packrat...
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USGS North American Packrat Midden Database
A Database of Paleoecological Records from Neotoma Middens in Western North America Dry caves and rockshelters in western North American host a unique and valuable paleobotanical resource known as packrat middens. Packrat ( Neotoma spp.) middens composed of desiccated fecal matter and urine also contain well preserved fossil plant materials. Over fifty years of scientific investigations on packrat...