{"thcode":2,"term":{"code":1036,"name":"sedimentation","parent":451,"scope":"Process of deposition of sediments (loose, uncemented pieces of rock, mineral fragments, or biological materials).  The sediments settle out of water or air into layers on a surface."},"uf":[{"name":"alluvial sedimentation","usewith":false},{"name":"deposition (sediment)","usewith":false},{"name":"dust deposition","usewith":false}],"bt":[{"code":451,"name":"geologic processes","parent":101,"scope":"All types of processes involving geological structures."},{"code":101,"name":"biological and physical processes","parent":1174,"scope":"All continuing activities, functions, and phenomena associated with organisms and non-living matter."},{"code":1174,"name":"topics","parent":1,"scope":"Themes, subjects, and concerns for which USGS information resources are relevant."},{"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":66,"name":"atmospheric deposition (chemical & particulate)","parent":63,"scope":"The transfer of substances from the air to the surface of the earth, either in wet form (rain, fog, snow, dew, frost, hail) or in dry form (gases, aerosols, particles)."},{"code":1035,"name":"sedimentary rocks","parent":1005,"scope":"Rocks formed by the consolidation of loose, uncemented pieces of sediments."},{"code":1037,"name":"sedimentology","parent":464,"scope":"Branch of earth sciences concerned with the study of the origin, composition, transport, and changes of materials deposited by water, wind, or ice."}]}