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National Geochronological Database

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Online link https://mrdata.usgs.gov/geochron/
Description Radiometric ages of geological materials by K-Ar, Rb-Sr, Sm-Nd, fission track, and U-Th-Pb dating methods. A revision of DDS-14 correcting locations and providing the data in more convenient formats.
Originators Sloan, Jan (Editor), Henry, Christopher D. (Editor), Hopkins, Melanie J. (Editor), Ludington, Stephen D. (Editor), Zartman, Robert E. (Compiler), Bush, Charles A. (Compiler), Abston, Carl C. (Compiler)
Publication U.S. Geological Survey Open-File Report 03-236

Related topics

Geospatial datasets, Geochronology, Potassium-argon analysis, Rubidium-strontium analysis, Uranium-lead analysis, Uranium-thorium analysis, Geologic history, KML, Comma-delimited text, Tab-delimited text, Shapefile

States or counties

Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
Sample locations in the conterminous United States
Sample locations in the conterminous United States

Geospatial Web Services (OGC)

Format Content Service URL
WMS Sample characteristics and geologic age information https://mrdata.usgs.gov/services/geochron?request=GetCapabilities&service=WMS&version=1.3.0
WFS Sample characteristics and geologic age analyses https://mrdata.usgs.gov/wfs/geochron?request=GetCapabilities&service=WFS&version=1.0.0&