{"thcode":4,"term":{"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..."},"uf":[],"bt":[{"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":[{"code":"1.2.3","name":"Beach sand","parent":"1.2","scope":"A loose aggregate of unlithified mineral or rock particles of sand size forming a beach (the relatively thick and temporary accumulation of loose water-borne material that is in active transit along, or deposited on, the shore zone between the limits of low water and high water)"},{"code":"1.2.2","name":"Mud flat","parent":"1.2","scope":"A relatively level area of fine silt along a shore (as in a sheltered estuary) or around an island, alternately covered and uncovered by the tide, or covered by shallow water..."},{"code":"1.2.1","name":"Playa","parent":"1.2","scope":"...a dry, vegetation-free, flat area at the lowest part of an undrained desert basin, underlain by stratified clay, silt, or sand, and commonly by soluble salts."},{"code":"1.2.4","name":"Terrace","parent":"1.2","scope":"A narrow shelf, partly cut and partly built, produced along a lake shore...and later exposed when the water level falls, or ...a wave-cut platform that has been exposed by uplift along a seacoast or by the lowering of sea level, and from 3 m to more than 40 m above mean sea level; an elevated marine-cut bench."}],"rt":[]}