{"thcode":61,"term":{"code":729,"name":"biostratigraphy","parent":728,"scope":"the study of fossil assemblages to determine the relative ages of sedimentary rock strata."},"uf":[],"bt":[{"code":728,"name":"stratigraphy","parent":711,"scope":"the study of layered sedimentary and volcanic rocks."},{"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":[],"rt":[{"code":512,"name":"biostratigraphic correlation","parent":511,"scope":"the use of fossil assemblages to establish the relative ages of sedimentary strata in different locations (i.e., where direct superposition cannot be observed); not to be confused with lithostratigraphic correlation (the matching of sedimentary strata based solely on rock type)."}]}