{"thcode":4,"term":{"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."},"uf":[],"bt":[{"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":[{"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":"1.7","name":"Biogenic material","parent":"1","scope":"An organic material produced directly by the physiologic activities of organisms, either plant or animal"},{"code":"1.9","name":"Clay or mud","parent":"1","scope":"A loose, earthy, extremely fine-grained, natural sediment composed primarily of clay-size or colloidal particles and characterized by high plasticity and by a considerable content of clay minerals..."},{"code":"1.3","name":"Eolian material","parent":"1","scope":"Sediments such as loess or sand deposited by the action of the wind"},{"code":"1.6","name":"Glacial drift","parent":"1","scope":"A general term applied to all rock material (clay, silt, sand, gravel, boulders) transported by a glacier and deposited directly by or from the ice, or by running water emanating from a glacier."},{"code":"1.12","name":"Gravel","parent":"1","scope":"A loose accumulation of rock fragments composed predominantly of more or less rounded pebbles and small stones"},{"code":"1.2","name":"Lake or marine sediment","parent":"1","scope":"A sedimentary deposit laid down conformably on the floor of, or along the shore of, a lake, sea, or ocean, usually consisting of coarse material near the shore and sometimes passing into clay and limestone in deeper water..."},{"code":"1.5","name":"Mass wasting material","parent":"1","scope":"Deposits formed by the dislodgement and downslope transport of soil and rock material under the direct application of gravitational body stresses."},{"code":"1.8","name":"Residuum","parent":"1","scope":"An accumulation or rock debris formed by weathering and remaining essentially in place after all but the least soluble constituents have been removed..."},{"code":"1.11","name":"Sand","parent":"1","scope":"A loose aggregate of unlithified mineral or rock particles of sand size (1\/16 to 2 mm); an unconsolidated deposit consisting essentially of medium-grained clastic particles."},{"code":"1.10","name":"Silt","parent":"1","scope":"A loose aggregate of unlithified mineral or rock particles of silt size (1\/256 to 1\/16 mm); an unconsolidated deposit consisting essentially of fine-grained clastic particles."},{"code":"1.4","name":"Volcanic ash","parent":"1","scope":"A fine pyroclastic material (under 2.0 mm in diameter).  The term usually refers to the unconsolidated material..."}],"rt":[]}