{"thcode":61,"term":{"code":464,"name":"drilling and coring","parent":462,"scope":"used for all methods of creating boreholes and retrieving either intact samples (cores) or disturbed samples (cuttings)."},"uf":[],"bt":[{"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":[{"code":465,"name":"box coring","parent":464,"scope":"technique for obtaining shallow, four-sided, relatively undisturbed samples of sea-floor sediments."},{"code":466,"name":"gravity coring","parent":464,"scope":"technique using a long, weighted cylindrical pipe to obtain sediment cores from the sea floor."},{"code":467,"name":"hand augering","parent":464,"scope":"technique for obtaining disturbed soil samples from successive depth intervals."},{"code":468,"name":"piston coring","parent":464,"scope":"technique using a gravity corer with an internal piston that enables the recovery of longer, less disturbed sediment cores from the sea floor."},{"code":469,"name":"push coring","parent":464,"scope":"technique using a short cylindrical tube that is gently pushed by mechanical means into sea-floor sediments."},{"code":470,"name":"rotary drilling","parent":464,"scope":"includes all types of rotary drilling, regardless of bit type (fixed cutter, roller cone, or auger) or sampling method (cores or cuttings)."},{"code":472,"name":"vibracoring","parent":464,"scope":"technique in which the coring tube is advanced into sea floor or wetland sediments by gravity and vibration."}],"rt":[]}