{"thcode":61,"term":{"code":178,"name":"sinkhole","parent":106,"scope":"a topographic depression created by collapse of the ground above a cave or cavern."},"uf":[],"bt":[{"code":106,"name":"landform","parent":94,"scope":"a geomorphic feature recognized as distinct from the surrounding terrain."},{"code":94,"name":"feature type","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":209,"name":"karst","parent":194,"scope":"terrain underlain by soluble bedrock such as limestone or marble and characterized by caves, caverns, sinkholes, and disappearing streams."}]}