{"thcode":4,"term":{"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"},"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":[],"rt":[]}