IDAHO GEOLOGICAL SURVEY DIGITAL WEB MAP MOSCOW-BOISE-POCATELLO WWW.IDAHOGEOLOGY.ORG GARWOOD AND OTHERS GEOLOGIC MAP OF THE WHITE BIRD QUADRANGLE, IDAHO COUNTY, IDAHO CORRELATION OF MAP UNITS Dean L. Garwood, Keegan L. Schmidt, John D. Kauffman, David E. Stewart, Table 1. Major oxide and trace element chemistry of samples collected in the White Bird quadrangle. Reed S. Lewis, Kurt L. Othberg, and Peter J. Wampler Artificial Alluvial Mass Movement Volcanic Rocks Intrusive Island-Arc Metavolcanic Major elements in weight percent Trace elements in parts per million Deposits Deposits Deposits Rocks and Metasedimentary Rocks Sample Map number Latitude Longitude Unit name unit SiO TiO Al O FeO* MnO MgO CaO Na O K O P O Ni Cr Sc V Ba Rb Sr Zr Y Nb Ga Cu Zn Pb La Ce Th Nd m Qam Qas Qaf Qlsa 2 2 2 3 2 2 2 5 Holocene 2007 Qamo 02RL800 45.78555 -116.27168 Basalt of Grangeville Tgv 52.20 1.276 15.36 8.90 0.159 7.53 11.30 2.38 0.74 0.161 57 223 25 219 267 14 245 112 23 11.7 20 67 74 3 20 31 4 Qahg Qaso Qafo Qls 06DG003 45.83366 -116.36833 Grande Ronde R2 Tgr2 56.51 2.284 14.12 11.31 0.185 3.15 6.79 3.37 1.84 0.444 5 10 30 326 759 47 360 189 36 11.5 21 12 139 10 29 60 6 32 15 Pleistocene QUATERNARY Qls 06DG004 45.83374 -116.36745 Grande Ronde R Tgr 56.52 2.297 14.64 12.12 0.140 2.44 6.33 3.50 1.57 0.441 8 11 33 341 775 39 336 196 55 11.5 22 23 150 8 28 48 6 30 Tgr Qam Tgr Tgn 2 2 1 Tgn1 20 1 1 FAULT Qc Qas Tgr 2 10 Qaf Tgn 06DG005 45.83207 -116.36594 Grande Ronde N1 Tgn1 55.68 2.217 14.10 11.93 0.187 3.28 7.00 3.57 1.59 0.438 11 10 34 359 764 38 323 190 42 11.2 21 16 135 7 26 52 4 34 TRPsd 1 UST Pliocene 25 10 45 THR 32 06DG006 45.84318 -116.36347 Grande Ronde R Tgr 54.15 2.296 13.80 13.02 0.211 3.93 7.71 3.08 1.38 0.426 11 18 35 367 620 38 334 167 38 10.0 22 22 128 6 21 44 4 28 Columbia River Basalt Group 2 2 10 06DG008 45.84217 -116.36459 Grande Ronde R Tgr 54.12 2.295 13.76 13.01 0.245 3.68 7.77 3.12 1.56 0.448 11 18 36 371 593 40 330 168 38 10.1 21 22 128 7 21 43 4 28 Tgn Saddle Mountains Basalt 2 2 1 10 20 TJd Latah Formation 06DG009 45.84703 -116.36073 Grande Ronde N1 Tgn1 54.02 2.315 13.70 12.79 0.227 3.99 7.79 3.20 1.53 0.452 14 20 35 374 602 35 332 165 37 10.9 20 22 130 6 22 45 4 26 TRPsd Qaf 30 50 Sediments Tgv 40 42 K 07DG106 45.75481 -116.27532 Basalt of Grangeville Tgv 52.46 1.299 15.52 9.07 0.161 7.32 10.99 2.34 0.68 0.171 62 225 33 231 280 14 240 117 24 10.3 16 67 80 1 19 38 2 20 27 EE R Grande Ronde Basalt CENOZOIC A 26 C 07DG120 45.84329 -116.35197 Grande Ronde N1 Tgn1 55.60 2.159 13.73 12.48 0.211 3.41 6.92 3.49 1.57 0.421 12 11 33 357 688 39 310 187 42 11.4 20 19 132 5 21 48 5 29 Tgr1 Tgr 07DG121 45.84381 -116.35135 Grande Ronde R Tgr 55.54 2.162 13.72 12.52 0.198 3.38 6.93 3.52 1.60 0.427 12 10 33 359 697 40 309 189 41 11.1 21 17 130 6 24 58 5 30 2 Tgr Miocene 2 2 Tgn 2 TERTIARY 1 TJd Tgr 07DG127 45.85137 -116.35651 Grande Ronde R Tgr 54.98 2.284 13.78 11.80 0.215 3.96 7.77 3.15 1.66 0.409 11 10 36 380 671 38 330 173 40 11.1 20 19 132 5 21 46 5 26 Tgr2 1 Tgn 2 2 35 TRPsd Tli 1 07DG128 45.85009 -116.35731 Grande Ronde R2 Tgr2 54.09 2.336 13.75 12.72 0.225 3.93 7.87 3.01 1.61 0.462 14 18 36 377 584 36 335 167 39 9.7 19 23 130 5 21 49 6 27 Tgr1 Tgr 07JK016 45.75423 -116.27872 Basalt of Grangeville Tgv 53.16 1.349 15.24 9.01 0.174 6.57 11.12 2.42 0.79 0.165 44 145 33 233 295 16 244 127 24 12.1 17 54 80 3 19 36 4 18 Qaf 2 35 30 Imnaha Basalt 07JK034 45.82903 -116.27606 Grande Ronde N1 Tgn1 55.23 2.065 13.94 11.96 0.199 3.90 7.70 3.08 1.56 0.349 12 10 34 359 594 38 318 179 38 10.4 20 38 123 6 20 46 5 25 07JK035 45.82876 -116.27782 Grande Ronde R1 Tgr1 56.01 2.068 14.25 10.81 0.191 3.97 7.58 3.07 1.74 0.316 11 12 32 347 667 47 358 188 35 10.2 20 35 117 7 18 50 6 28 R Tim E M 07JK076 45.78057 -116.31659 Imnaha Tim 51.81 3.053 13.60 13.82 0.234 4.33 8.58 3.23 0.89 0.444 21 22 38 394 415 35 265 246 48 16.8 20 85 138 3 25 54 4 32 Tgn1 29 Qam 31 M Eocene A 07JK087 45.77493 -116.26951 Basalt of Grangeville Tgv 52.66 1.290 15.25 10.19 0.285 6.22 10.84 2.39 0.72 0.161 47 145 34 232 490 15 247 121 23 11.6 16 64 79 2 19 35 4 19 H 35 Tjd Qls Seven Devils Volcanics 37 CRETACEOUS 07KS018 45.77685 -116.33117 TRPsd 73.08 0.427 13.87 4.18 0.300 0.66 0.61 6.34 0.44 0.105 0 4 14 66 178 6 109 90 33 1.5 15 7 100 4 2 14 3 10 45 Tgr lithic tuff Tgr1 2 07RL518 45.78125 -116.35686 Seven Devils Volcanics TRPsd 52.65 1.460 16.30 11.38 0.191 4.76 8.49 3.34 1.24 0.195 18 32 42 407 257 25 233 100 39 1.6 18 12 101 0 10 18 1 15 35 Tgn KJdg basaltic andesite Tgr2 35 TJd 1 JURASSIC MESOZOIC * Major elements are normalized on a volatile-free basis, with total Fe expressed as FeO. 33 B 29 Qafo All analyses performed at Washington State University GeoAnalytical Laboratory, Pullman, Washington. 34 TJd Qamo 51 TRIASSIC 66 TRPsd 65 Qamo TJd PERMIAN PALEOZOIC 07DG127 Qam KJdg Qamo Qaf TRPsd 07DG128 48 45 06DG009 Qaf Tgn1 Tgn1 20 Qamo INTRODUCTION SYMBOLS 07DG121 Qls 06DG006 07DG120 Tgr 2 30 Qam Tgn1 Devils Group. The upper package of the Seven Devils Group in the 06DG008 Tim The geologic map of the White Bird quadrangle depicts rock units Qls Landslide deposits (Holocene and Pleistocene)—Poorly sorted and poorly Tim Imnaha Basalt Contact: dashed where approximately located. Tgr 20 1 Qam Qaf exposed at the surface or underlying thin surficial cover of soil and stratified angular basalt cobbles and boulders mixed with silt and clay. footwall has been deformed into open, shallowly south-southeast- Imnaha Basalt (Miocene)—Medium- to coarse-grained, sparsely to plunging folds with amplitudes of hundreds of meters. Splays of the Fault: bar and ball on downthrown side; dashed where TJd colluvium. Thicker surficial alluvial, colluvial, and landslide deposits are Deposited by slumps, slides, and debris flows. In addition, the unit may Qaf approximately located; dotted where concealed. Qls also shown where they mask or modify the underlying rock units or form include the landslide scarp and the headwall (steep area adjacent to and abundantly plagioclase-phyric basalt; olivine common; plagioclase Hammer Creek thrust occur in rocks of the footwall both north and south phenocrysts generally 0.5-2 cm long but some as large as 3 cm. Normal of Hammer Creek Bar. Near Shorts Bar, this fault thrusts the lower package Qamo significant mappable units. The plateau soils include loess parent material below the landslide scarp) from which material broke away (see Symbols). Thrust fault: dashed were approximately located; dotted magnetic polarity. Weathers to a sooty brown granular detritus. of Seven Devils Group rocks westward over rocks of the upper package. Tgr1 (Barker, 1982), but because loess deposits are thin, they are not included Location of landslide deposits in steep canyons is typically controlled by where concealed; teeth on upper plate. KJdg on this map. In addition to present channel deposits, the Salmon River the presence of sedimentary interbeds and the interface between basalt Commonly has well-developed fanning or irregular columns 1-2 feet in The Hammer Creek thrust appears to be part of a major thrust fault system FAULT diameter.