{"thcode":61,"term":{"code":728,"name":"stratigraphy","parent":711,"scope":"the study of layered sedimentary and volcanic rocks."},"uf":[],"bt":[{"code":711,"name":"geology","parent":639,"scope":"the study of the Earth's structure, composition, past and present processes, and history."},{"code":639,"name":"discipline","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[{"code":729,"name":"biostratigraphy","parent":728,"scope":"the study of fossil assemblages to determine the relative ages of sedimentary rock strata."}],"rt":[{"code":482,"name":"stratigraphic characterization and correlation","parent":400,"scope":"field observation of sedimentary rock strata at two or more locations, with the goal of establishing their physical continuity or temporal equivalence."}]}