{"thcode":2,"term":{"code":468,"name":"geomorphology","parent":464,"scope":"Branch of geology dealing with surface land features and the processes that create and change them."},"uf":[{"name":"speleology","usewith":false}],"bt":[{"code":464,"name":"geology","parent":291,"scope":"Study of the planet earth, its composition, structure, physical and chemical processes, and history since its origin."},{"code":291,"name":"earth sciences","parent":1019,"scope":"Broad term for all science related to the study of the earth."},{"code":1019,"name":"sciences","parent":1,"scope":"Major educational fields, fields of study, and professional groupings within USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[],"rt":[{"code":80,"name":"bathymetry","parent":1176,"scope":"The elevation of the earth's surface beneath a body of water, especially the ocean, typically determined by measurements of depth from the water surface."},{"code":353,"name":"erosion","parent":451,"scope":"The process whereby materials of the earth's crust are loosened, dissolved, or worn away and simultaneously moved from one place to another."},{"code":626,"name":"land surface characteristics","parent":287,"scope":"Features and attributes of earth's land surface."},{"code":639,"name":"landslides","parent":1736,"scope":"Downslope movement of rock, soil, or artificial fill under the influences of gravity."},{"code":624,"name":"subsidence","parent":451,"scope":"Settling, compaction, or caving in of land caused by subsurface mining, ground-water withdrawal, or pumping of oil and gas."},{"code":1176,"name":"topography","parent":287,"scope":"Configuration of the land surface and sea floor."}]}