{"thcode":3,"term":{"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.]"},"uf":[],"bt":[{"code":952,"name":"ridges","parent":710,"scope":"Elevations with a narrow, elongated crest which can be part of a hill or mountain. [USGS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":710,"name":"mountains","parent":816,"scope":"Landmasses that project conspicuously above their surroundings. [USGS Circ 1048]"},{"code":816,"name":"physiographic features","parent":1,"scope":null},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[],"rt":[{"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>]"}]}