{"thcode":4,"term":{"code":"1.1.5","name":"Alluvial terrace","parent":"1.1","scope":"A stream terrace composed of unconsolidated alluvium (including gravel), produced by renewed downcutting of the flood plain or valley floor..."},"uf":[],"bt":[{"code":"1.1","name":"Alluvium","parent":"1","scope":"A general term for clay, silt, sand, gravel or similar unconsolidated detrital material, deposited during comparatively recent geologic time by a stream or other body of running water, as a sorted or semi-sorted sediment..."},{"code":"1","name":"Unconsolidated material","parent":"0","scope":"A sediment that is loosely arranged or unstratified, or whose particles are not cemented together, found either at the surface or at depth."},{"code":"0","name":"Earth material","parent":null,"scope":"Geologic map unit classification (Bruce R. Johnson) version 6.2: A hierarchical classification of earth materials for digital geologic maps."}],"nt":[],"rt":[]}