{"thcode":3,"term":{"code":421,"name":"fracture zones","parent":1010,"scope":"Elongated zones of unusually irregular topography on the deep-sea floor that often separate regions of different depths [Glossary of Geology, 4th ed.]"},"uf":[],"bt":[{"code":1010,"name":"seafloor features","parent":816,"scope":null},{"code":816,"name":"physiographic features","parent":1,"scope":null},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":374,"name":"fault zones","parent":375,"scope":"Areas characterized by fractures in the Earth's crust. [Adapted from UGSG Circ 1048]"}]}