{"thcode":3,"term":{"code":447,"name":"glacier features","parent":529,"scope":"Bodies or streams of ice moving outward and downslope from an area of accumulation; areas of relatively permanent snow or ice on the top or side of a mountain or mountainous area. [USGS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},"uf":[{"name":"glaciers","usewith":false},{"name":"nunataks","usewith":false}],"bt":[{"code":529,"name":"ice masses","parent":525,"scope":"Fields of ice, formed in regions of perennial frost. [USGS Circ 1048]"},{"code":525,"name":"hydrographic features","parent":1,"scope":"For natural bodies of water. For constructed waterways, reservoirs, and such, use 'hydrographic structures'."},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"code":337,"name":"drumlins","parent":952,"scope":"Low, smoothly rounded, elongate oval hills, mounds or ridges of compact glacial till built under the margin of the ice and shaped by its flow, or carved out of an older moraine by readvancing ice. [Adapted from Glossary of Geology, 4th ed.]"},{"code":703,"name":"moraines","parent":816,"scope":"Accumulations of earth and stones carried and deposited by a glacier. [USGS Circ 1048]"}]}