{"thcode":3,"term":{"code":816,"name":"physiographic features","parent":1,"scope":null},"uf":[{"name":"aprons (geological)","usewith":false},{"name":"blowholes","usewith":false},{"name":"blowouts","usewith":false},{"name":"boulder fields","usewith":false},{"name":"cones (geological)","usewith":false},{"name":"crevasses","usewith":false},{"name":"fissures","usewith":false},{"name":"furrows","usewith":false},{"name":"geological features","usewith":false},{"name":"grades (physiographic)","usewith":false},{"name":"hammocks","usewith":false},{"name":"inclines","usewith":false},{"name":"landslides","usewith":false},{"name":"meander necks","usewith":false},{"name":"pitches (physiographic)","usewith":false},{"name":"polders","usewith":false},{"name":"potholes","usewith":false},{"name":"rockfalls","usewith":false},{"name":"sinkholes","usewith":false},{"name":"sinks","usewith":false},{"name":"siphon (physiographic)","usewith":false},{"name":"slides (natural)","usewith":false},{"name":"slopes","usewith":false},{"name":"talus slopes","usewith":false},{"name":"terraces (physiographic)","usewith":false},{"name":"uplands","usewith":false}],"bt":[{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[{"code":28,"name":"alluvial fans","parent":816,"scope":"Fan-shaped deposits of alluvium (river or stream-bed  sediment)."},{"code":62,"name":"arroyos","parent":816,"scope":"Small deep flat-floored channels or gullies of an ephemeral stream or of an intermittent stream, usually with vertical or steeply cut banks. [Adapted from Glossary of Geology, 4th ed.]"},{"code":77,"name":"badlands","parent":816,"scope":"Areas characterized by a maze of very closely spaced, deep, narrow, steep-sided ravines, and sharp crests and pinnacles. [NIMA GEONet Designation ... Definitions <http:\/\/164.214.2.59\/gns\/html\/desig.html> ]"},{"code":84,"name":"banks (hydrographic)","parent":816,"scope":"Sloping margins of, or the ground bordering, a stream, and serving to confine the water to the natural channel during the normal course of flow. [Glossary of Geology, 4th ed.]"},{"code":92,"name":"bars (physiographic)","parent":816,"scope":"Natural accumulations of sand, gravel, or other material forming an underwater or exposed embankment. [USGS Circ 1048]"},{"code":95,"name":"basins","parent":816,"scope":"Bowl-shaped, natural depressions in the surface of the land or ocean floor. [Adapted from USGS Circ 1048]"},{"code":102,"name":"beaches","parent":816,"scope":"Sloping shores along a body of water that is washed by waves or tides and is usually covered by sand or gravel. [USGS GNIS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":111,"name":"bights","parent":816,"scope":"Long gradual bends or gentle curves, or slight crescent-shaped indentations, in the shoreline of an open coast or of a bay. [Glossary of Geology, 4th ed.]"},{"code":168,"name":"capes","parent":816,"scope":"Projection of land extending into a body of water that prominently marks a change in or interrupts the coastal trend of that water body. [USGS Circ 1048]"},{"code":183,"name":"caves","parent":816,"scope":"Natural underground passageways or chambers, or hollowed out cavities in the side of a cliff. [USGS GNIS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":200,"name":"cirques","parent":816,"scope":"Bowl-like hollows partially surrounded by cliffs or steep slopes at the head of a glaciated valley. [NIMA GEONet Designation ... Definitions <http:\/\/164.214.2.59\/gns\/html\/desig.html>]"},{"code":211,"name":"cliffs","parent":816,"scope":"High vertical, near-vertical, or overhanging faces of rock, earth, or ice. [USGS Circ. 1048]"},{"code":285,"name":"craters","parent":816,"scope":"Circular-shaped depressions at the summit of a volcanic core or on the surface of the land caused by the impact of a meteorite; man-made depressions caused by an explosion. [USGS GNIS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":305,"name":"deltas","parent":816,"scope":"Flat plains formed by alluvial deposits at the mouth of a stream. [NIMA GEONet Designation ... Definitions <http:\/\/164.214.2.59\/gns\/html\/desig.html>]"},{"code":342,"name":"dunes","parent":816,"scope":"Low mounds, ridges, banks, or hills of loose, wind-blown granular material, either bare or covered with vegetation, capable of movement from place to place but always retaining their characteristic shape. [Adapted from Glossary of Geology, 4th ed.]"},{"code":399,"name":"flats","parent":816,"scope":"Relatively level areas within regions of greater relief. [USGS GNIS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"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.]"},{"code":578,"name":"isthmuses","parent":816,"scope":"Narrow sections of land in a body of water connecting two larger land areas. [USGS Feature Class Definitions <http:\/\/geonames.usgs.gov\/domestic\/feature_class.htm>]"},{"code":584,"name":"karst areas","parent":816,"scope":"Areas of geologic formations of irregular limestone deposits with sinks, underground streams, and caverns.  [EPA Terms of Environment < http:\/\/www.epa.gov\/OCEPAterms\/>]"},{"code":614,"name":"ledges","parent":816,"scope":"Narrow shelves or projections of rock formed on a rock wall or cliff face. [Glossary of Geology, 4th ed.]"},{"code":658,"name":"massifs","parent":816,"scope":"Massive topographic and structural features, commonly formed of rocks more rigid than those of their surroundings. [Adapted from Glossary of Geology, 4th ed.]"},{"code":668,"name":"mesas","parent":816,"scope":"Very broad, flat-topped, usually isolated hills or mountains of moderate height bounded on at least one side by a steep cliff or slope and representing an erosion remnant. [Glossary of Geology, 4th ed.]"},{"code":686,"name":"mineral deposit areas","parent":816,"scope":"Areas where masses of naturally occurring mineral material are found, e.g. metal ores or nonmetallic minerals. [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]"},{"code":710,"name":"mountains","parent":816,"scope":"Landmasses that project conspicuously above their surroundings. [USGS Circ 1048]"},{"code":732,"name":"natural rock formations","parent":816,"scope":"Naturally formed topographic features, commonly differing conspicuously from adjacent objects or material. [Adapted from Glossary of Geology, 4th ed.]"},{"code":827,"name":"plains","parent":816,"scope":"Regions of general uniform slope, comparatively level and of considerable extent. [USGS Circ 1048]"},{"code":832,"name":"plateaus","parent":816,"scope":"Comparatively flat areas of great extent and elevation; specif. extensive land regions considerably above the adjacent country or above sea level; commonly limited on at least one side by an abrupt descent, have flat or nearly smooth surfaces but are often dissected by deep valleys and surmounted by high hills or mountains, and have a large part of their total surface at or near the summit level. [Glossary of Geology, 4th ed.]"},{"code":835,"name":"playas","parent":816,"scope":"Closed depressions in an arid or semi-arid region that are periodically inundated by surface runoff, or the salt flat within such a closed basin.[Encyc. Dictionary of Physical Geography]"},{"code":921,"name":"reefs","parent":816,"scope":"Chains of rocks or coral at or near the surface of water. [USGS Circ 1048]"},{"code":1010,"name":"seafloor features","parent":816,"scope":null},{"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":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.]"},{"code":1208,"name":"volcanic features","parent":816,"scope":"Features formed from those igneous rocks that have reached or nearly reached the Earth's surface before solidifying. [Adapted from Glossary of Geology, 4th ed.]"}],"rt":[{"code":112,"name":"biogeographic regions","parent":928,"scope":"Geographic regions characterized chiefly by the dominant forms of plant life and the prevailing climate. [Adapted from American Heritage Dic. of the English Language, 4th ed.]"}]}