{"thcode":4,"term":{"code":"1.3.1","name":"Dune sand","parent":"1.3","scope":"A type of blown sand that has been piled up by the wind into a sand dune, usually consisting of rounded mineral grains, commonly quartz, having diameters ranging from 0.1 to 1 mm."},"uf":[],"bt":[{"code":"1.3","name":"Eolian material","parent":"1","scope":"Sediments such as loess or sand deposited by the action of the wind"},{"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":[]}