{"thcode":25,"term":{"code":22,"name":"lithology","parent":5,"scope":"Rock types; may be further divided by composition, texture, mode of formation, or physical form of the rock body."},"uf":[{"name":"rock types","usewith":false}],"bt":[{"code":5,"name":"theme","parent":2,"scope":"Terms indicate domains of human concern, such as scientific discipline, societal problems, or characteristics of earth, space, oceans, and living things."},{"code":2,"name":"(subjects)","parent":1,"scope":"Distinct segments of human knowledge, such as place, time, or theme."},{"code":1,"name":"Categories","parent":null,"scope":"Characteristics applicable to entire controlled vocabularies.  We expect these terms to help people decide which vocabularies to use for particular purposes in the absence of official guidance."}],"nt":[],"rt":[]}