{"thcode":1,"term":{"code":"ar500","name":"Sandstone and carbonate-rock aquifers","parent":"art","scope":"aquifer rock type"},"uf":[],"bt":[{"code":"art","name":"(aquifer rock types)","parent":"aroot","scope":"Generalized rock types of aquifers"},{"code":"aroot","name":"US Aquifers","parent":"fUS","scope":"Aquifers of the 48 conterminous United States, Hawaii, Puerto Ri"},{"code":"fUS","name":"United States","parent":"fLD10","scope":"country"},{"code":"fLD10","name":"North America","parent":"fLD","scope":"continent"},{"code":"fLD","name":"Land","parent":"root","scope":"continent"},{"code":"root","name":"Earth","parent":null,"scope":"Common geographic areas focused on the US"}],"nt":[],"rt":[{"code":"a501","name":"Edwards-Trinity aquifer system","parent":"aroot","scope":"aquifer"},{"code":"a503","name":"Mississippian aquifers","parent":"aroot","scope":"aquifer"},{"code":"a504","name":"Paleozoic aquifers","parent":"aroot","scope":"aquifer"},{"code":"a502","name":"Valley and Ridge aquifers","parent":"aroot","scope":"aquifer"},{"code":"a505","name":"Valley and Ridge carbonate-rock aquifers","parent":"aroot","scope":"aquifer"}]}