AGE DETERMINATIONS
change note: 2017-03-10 10:57:05.0 [tstevens] update Definition (Pertaining to the methods, results, and studies involved in determining the age of rock units found in and on the Earth's crust.); update Definition (USGS);
in scheme: sciencekeywords
definition: Pertaining to the methods, results, and studies involved in determining the age of rock units found in and on the Earth's crust.
type: Concept

ROCKS/MINERALS/CRYSTALS
type: Concept