{"thcode":2,"term":{"code":1677,"name":"luminescence dating","parent":1680,"scope":"Dating methods that involve the analysis of the optical properties of minerals exposed to environmental radiation.  Typically used to determine the age of subaerial exposure of surficial sediments."},"uf":[{"name":"TL\/OSL dating","usewith":false},{"name":"optically-stimulated luminescence dating","usewith":false},{"name":"thermoluminescence dating","usewith":false}],"bt":[{"code":1680,"name":"age estimation methods","parent":619,"scope":"Methods used to determine the age of earth materials, typically by laboratory analysis of properties of those materials."},{"code":619,"name":"laboratory methods","parent":734,"scope":"Techniques to analyze and test samples in a place equipped and designed for the work."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[]}