{"thcode":3,"term":{"code":1249,"name":"subduction zones","parent":1135,"scope":"Convergent tectonic plate boundaries in which one plate is moving downward."},"uf":[],"bt":[{"code":1135,"name":"tectonic features","parent":816,"scope":"Features resulting from structural deformation of the earth's crust through tectonic processes. [Adapted from American Heritage Dic. of the English Language, 4th ed.]"},{"code":816,"name":"physiographic features","parent":1,"scope":null},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[]}