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USGS · rb 21 28 33 gn 1 001' 18 mils rb 81.85) .13 27' 15½0 276 mils rb r(.85) .02 .017 32 45015' 106030' base from u.s. geological survey, 1966 5000 6000 1 44 e 2000 3000 4000

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Page 1: USGS · rb 21 28 33 gn 1 001' 18 mils rb 81.85) .13 27' 15½0 276 mils rb r(.85) .02 .017 32 45015' 106030' base from u.s. geological survey, 1966 5000 6000 1 44 e 2000 3000 4000