{"thcode":4,"term":{"code":"2.1.3.1.2","name":"Calcarenite","parent":"2.1.3.1","scope":"A clastic sedimentary rock that is made up predominantly of recycled carbonate particles of sand size; a consolidated calcareous sand"},"uf":[],"bt":[{"code":"2.1.3.1","name":"Arenite","parent":"2.1.3","scope":"A \"clean\" sandstone that is well-sorted, contains little or no matrix material, and has a relatively simple mineralogic composition; specif. a pure or nearly pure, chemically cemented sandstone containing less than 10% argillaceous matrix."},{"code":"2.1.3","name":"Sandstone","parent":"2.1","scope":"A medium-grained clastic sedimentary rock composed of abundant sand-sized fragments, which may have a finer-grained matrix (silt or clay), and which is more or less indurated by a cementing material..."},{"code":"2.1","name":"Clastic rock","parent":"2","scope":"A composed principally of broken fragments that are derived from preexisting rocks or minerals and that have been transported some distance from their place of origin."},{"code":"2","name":"Sedimentary rock","parent":"0","scope":"A rock resulting from the consolidation of loose sediment that has accumulated in layers..."},{"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":[]}