{"thcode":61,"term":{"code":475,"name":"grab sampling","parent":473,"scope":"obtaining sediment or rock samples by dropping a clamshell device onto the sea floor."},"uf":[],"bt":[{"code":473,"name":"surface sampling","parent":462,"scope":"used for all methods of sampling exposed earth materials, water, or ice; do not use for samples obtained from boreholes."},{"code":462,"name":"sampling","parent":400,"scope":"used for the collection of physical samples and also images that document physical conditions."},{"code":400,"name":"field observation","parent":398,"scope":"scientific investigation of physical or biological features and processes in a natural setting."},{"code":398,"name":"research method","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[]}