{"thcode":61,"term":{"code":701,"name":"geochronology","parent":639,"scope":"the science of determining the absolute ages of earth materials"},"uf":[],"bt":[{"code":639,"name":"discipline","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":502,"name":"absolute dating (geologic)","parent":501,"scope":"used for all geologic dating methods yielding numerical ages"}]}