pubs.usgs.gov2.3(H) O O GL R 8.3 C 2.2(ST) O O GL 480(est.) R 31.5 C 2.4(ST) O GL 480(est.) R 31.3 C 1.8(ST) O GL 498(est.) C 2.9(H) O 49 (est.) 271 74 295 110 172 180 2.4(H) O GL