{"thcode":3,"term":{"code":433,"name":"gaps","parent":816,"scope":"Ravines or gorges cut deeply through mountain ridges, or between hills or mountains. [Glossary of Geology, 4th ed.]"},"uf":[{"name":"cols","usewith":false},{"name":"defiles","usewith":false},{"name":"passes","usewith":false},{"name":"saddles (physiographic)","usewith":false},{"name":"sills (physiographic)","usewith":false}],"bt":[{"code":816,"name":"physiographic features","parent":1,"scope":null},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":1197,"name":"valleys","parent":816,"scope":"Low-lying land bordered by higher ground; especially elongate, relatively large gently sloping depressions of the Earth's surface, commonly situated between two mountains or between ranges of hills or mountains, and often containing a stream with an outlet. [Glossary of Geology, 4th ed.]"}]}