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Here are some USGS Web pages with more information on fission-track dating and Anywhere:

Geochronology Description of the methods of geochronology used to estimate the dating of rocks and sediments with links to technique, equipment and contacts for a variety of methods. (Score: 1.000)

Geological Survey TRIGA Reactor (GSTR) Services Wesbsite on services available at the Geological Survey TRIGA Reactor (GSTR) site in Denver with information on irradiations, neutron activation analysis, fission track radiography, and geochronology plus how to schedule tours of the facility. (Score: 1.000)

Geochronology (Western Earth Surface Processes Team) Description of the methods of geochronology, the science of dating, used by USGS scientists in geological research. (Score: 0.690)

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About fission-track dating:

Definition: Method of calculating an age in years, for micas, tektites, meteorites and other such materials, by determining the ratio of the spontaneous fission-track density to induced fission tracks. [Adapted from Glossary of Geology, 4th ed.]

Used for: age dating (fission-track), fission-track method