IDAHO GEOLOGICAL SURVEY GEOLOGIC MAP 48 MOSCOW-BOISE-POCATELLO WWW.IDAHOGEOLOGY.ORG KAUFFMAN AND OTHERS

B 55 49 52 65 120 Taw Tim 30 22 Tim 47 56 36 85 84 57 44 28 Mzao 369 Qls 55 Tgr Taw Tpr Taw Qls Tim 198 Tli Qls Qls Qls Tim 48 25 62 Qaf Qal Qls Tli Taw? 1 Taw Twe 464 Taw Tgr Tgr2 23 OD Qls Tim Qal Tim 14 85 Tim Qal 29 60 Mzgo 168 1 Tli Tif COTTONWO Tgr1 Tim KJdg Qal KJqd 55 KJqdg Tgr Tgr KJbtg? Mzgo Taw 33 35 27 62 KJdg KJdg Qaf 43 40 Mzcso 1 1 Mzqo Mzqo? Qls Qal 5 Tgn CREEK Tim 15 Qag KJqd Kbtog 73 Qls 56 Qag 84 Qls Tim Mzgo Tli Zss Twe? 45 Taw Qls Tpr 1 Tim 18 Tgr2 5-8 KJdg 13 42 Qls 80 Tpr Tgr Tpr Qal Tgn1 Qls Tli 48 58 Kbtog Tim 400 40 2 Tgr2 FAULT Taw Tim? 58 54 Qls Kbtog 51 Tim Qls Qls 50 Mzqo 50 50 32 192 Tgr Tgr1 Tli Qls 75 86 70 Qls Tcsc 45 65 55 Mzqo Qls 170 1 242 Tgr1 Tli Qal Tim? Twe 60 65 Tpd 460 Tli LEWISTON Qls 219 Ktr 35 KJdg 55 54 62 Kbtog Tli? Qls Tgr Qal 4 Tgr1 Tli KJqd Twe? Kbtog 0 Mzmo 55 55 Ktt 40 1 Tim Tgn Tpr Tgr Qls Tgr Qls 35 Qls Tgn ? 39 Qls Ktt Tgr1 Qls Qls Qls HILL 3 1 241 Qls 1 1 80 35 35 36 JPg Qal 1 18 Twe Tpr Qls Tgn1 Qls Qls Tgn 30 61 Taw Ktt 55 Qls Qls Taw 1 Tim Qls Qls 35 Qls Tim 52 55 80 Tli Qls 45 50 45 60 55 Mzgo Tli ANTICLINE Tgr Tim Tgn1 Tif Tgr Tpr Qls Tgn Tgr1 56 Kbtog 60 50 Qal 67 2 Tgr2 2 Tgr1 1 Qls 309 Qls 82 Taw 50 Qls? Tli 6 Tgr2 Tgr Tgr Qls JPg 58 393 Mzgo Mzqo Qls 123 25 Tpr 204 1 1 Qls 40 Twe Tgr 58 65 43 Tli 50 80 Tli 4 1 47 38 65 40 Qls Taw 3 Tli Tli Twe 44 387 Tli Qls 65 85 124 Tpr Tim Tgr 2 Tli 269 JPg Tgn1 347 Mzgo 55 450 Tpr Qls 2 224 2-5 Tli Tli Qls 2-4 JPg? Qls Tgr Qls Qls Mzqo 64 Tpr 25 60 Qal Taw Taw Qls Tim 1 67 Tli 35 Mzgo m Tli Qls 225 229 Qls 39 Mzmo Qls Tim Tgr1 Ktt 55 7 83 162 Tgr1 Taw 2-5 12 325 331 Tli Tgr1 55 Taw Mzgo Tcsc Tpr Tgr KJqd Qal Tim 70 Tim Tpr 355 Qal Qal Twl Taw 2 87 Twl Qls Tpr Tpr Tgr KJqd Tim Taw 70 19 60 Taw Qls Tpr 125 2 Tpr Tli 201 6 Tgr2 2 Qls Tgn1 Qls 60 55 Taw Qls 45 Tif Tpr? 250 Tgr1 Tim 64 Qls Tgn Tli Qls 442 Twe Tcsc Twl 54 63 70 Qls 4 158 Tif Tpr Taw Qls 1 Tim 65 Ktt 48 Tgn1 Tgr2 Tli Qls Tgr Tgn1 Kpeg Mzgo 410 Tli Tpr Tli Tgn1 2 244 Qls Qls Qls 60 Taw Tli Taw 46 68 Tgr Tgr1 279 Qls Qls 319 332 Tgr 375 Twe 3840 Tpr Tli 2 2 214 260 Tgr Tli Tli Twe 70 1 Mzgo m Tpr Qls 8 Tgr2 4 2 1 Qls Qls Tli Tcsc Tpr 10 15 Tli Tpr Qal Tpr Tif Qls 315 327 Kbtog 69 50 Tcsc 24 Tli 2 Tgr Tli? 367 Qls 7 Qls Twl Qls Tpr? Tif 25 2 Qls Qls Qls 278 Tgr Tli? Qls Tli Mzao 10 Tgr Qal Tif Tim 1 Qls Tgn Ktt70 Taw 30 43 2 128 Tgn1 Tli Tgr Taw Twe Tgr1 Qls 1 Tgr 30 10 5 2 Qls Qls 290 Tgn Qal Qls 1 Tpr Tgn 35 60 m Qal 114 7 Tli Tif 233 1 Qls Taw 30 1 ESCARPMENT 143 Taw 174 Tpr222 Tli Taw Qls Tli Qls Twe 25 94 127 Qal Tpr Tif Twe Qls Qls Qls Qls Tgr Tli 421 Twe VISTA FAULT45 37 Tli 227 Qls 298 1 Qls Taw 414 20 HILL 15 Tclg 11Qal7 Qls Tli Qls Twe Taw 409 Twl Tgr2 Twe 328 18 8 9 Tpr Tli Tif 282 Tim Tgr1 Tim Qls Tcsc Tclg 104 Tgr2 Tgr2 Taw 240 Qls Qls AHSAHKA Qal Twe ISTON 4 Taw 245 Tli 322 Qal Tgr1 Tli 429 454 Twe Tgr 44 14 Tclg Tli 254 263 Tgn1 Tim 434 2 LEW 5 Qal 2 11 216 Qls THRUST Tli? Tgr2 Qls Tgn1 207 Tpr Tif Qls 276 326 459 WILMA FAULT Tlm 89 Tpr Tgr Tif Qls Tli Tli? Twe Qls 70 45 59 Tclg 2 Qal 247 Qls FAULT 80 Ktt 441 55 Tgr2 Tli 150 181 Tif Qls Tgr1 Tli Taw Tclg Tclg Qls 5 194 211 283 Tli 324 Qal Ktt Qls Mzmo Tpr Qal Tpr Qal Tpr Tgr2 65 Tgn1 Tif? Tim Tgr1 348 Qls m 6 Tpr 209 Qls 307 Qls Qal Mzgo Tpr Tli Tgn1 Taw Tim Mzgo Tgr1 70 80 Tpr Tclg 1-3 Qls 75 Tli Mzgo 50 m m Tli Qal Qal 253 Tgn1 Tgr1 Qls 311 17 Tcsc? 50 20 Tcsc m Tpr Tgr Twe Tgn Tim 70 Tgr2 Tlm Qal 82 Tif 2 Qls Qal Tab 68 68 Tli 1 60 Tli 151 2 Taw Tgr Tgr Tli 56 50 60 Taw 55 Twe Qal Qal 2 2 262 284 Tli 58 223 257 Qal Tgr1 Mzmo 10 Tpr Qls Twl Tgr Qls 317 40 60 Qls Tli? Mzgo Qls Tgr Tpr Tif Tif? Taw 1 Tli Qls 60 Tpr Tlm 57 2 Taw 232 238 Tgn Qls? 60 Tgn1 Qls Qls Tli 66 Twl Taw 1 Tgn1 Tgn 55 458 Mzqo 60 373 1 Taw Taw 45 Tim Tgr1 Tgr1 Qls 165 183 Tif Tgn1 67 75 52 Tcsc 55 456 Tli Tgr2 Twe 67 Qb Tgr 248 Tif Qls KJqdg 407 Taw Qls 75 81 Tpr 2 Tif Twe Twe Tim Qls 1-3 Twe Tgr 62 Qls Qal Tgr 1? Taw Taw Tif 1 Tli Tpr Tgn1 50 50 Qls Qal Tclg Qls 4 Qls Tgn 65 Twe Taw Twl Twl Tpr 1 Qal Twe Taw Tif? Tif 285 Tgn 50 Taw m 133 Tgn 337 1 52 1 KJqd 65 Tlm Qls 136 Tpr Qls Twe Tli? 67 Tli Tpr 171 75 Tcsc Tcsc Qls 145 153 Qal 185 4 Qls 231 258 54 Qls Tgr ? m Tpr Tif Qal 1 Qal Tli 140 Tgr2 Tgr 1? 249 Qls Qal Tli Qls Tgr2 Qls 255 Tli Qls Taw Taw 53 SYNCLINE Tgr Tab 25 Taw LEWISTON Qls 230 1 16 383 m Tgr Tif Tcsc? Tli 2 2 Tgr Tim 349 432 Tpr 76 Tli 15 Tgr 2 Tgn ? 80 Taw Tcsc? Tli 2 Tgr2 Tgn1 Tgr1 1 55 70 30 388 408 Qls 221 1-3 271 20 30 Tli Qls 60 85 54 Tli Tli 41 Qal 205 Taw Qls Twe 49 Twl Twl Qls Taw Tgr Tgr Qls Twe Taw Taw 2 3-5 266 Tif 1 Qls KJqd 372 Tcsc 2 Qls m Tab 40 Twe A’ Qls Tpr Tpr Qls 3-7 Qls Tgr 33 Taw Tpr? Tpr Tcsc? Tcsc? m 1 368 Tab 74 Twl Tgr Tgn1 E S C A R P M E N T Twe Kbto Qls Tli 107 m 2 35 Tif Twe 75 Tgr1 Qls Tli Tgn1 Qal Tgr1 Qal 243 Tif Tpr 45 Tli Taw 91 Tif 50 70 80 Tcsc? m Qls 1 70 55 65 65 Tem Twl 58 Tli Tgn Qls Qls 50 Taw Taw Tgn1 1 Tif Tif 55 50 65 75 Qal Taw 50 Tgn Qls 65 70 438 Taw Qls Tgn 1 Tgr2 Qtg 55 Tgr Qaf 1 Tgr1 Tgr1 Twe 80 50 70 1 Twe 32 Tli 74 Qal Tpr Tgn1 2 Tgn 20 Qls 67 Kbtog Tpr Qls Tli Qls Qaf 302 Qal 1 Twe Kbto 45 Kbto 70 Tli Qls Tgn Tcg Tgr1 70 Qls Tli Tpr Qls 1 Tif Qls 70 Tli Taw Qls Tli Taw 182 Tpr Qls Tim Tif? Tcg Tgr 60 65 78 30 Tcsc? Tt Tpr Tgn1 1 338 70 80 31 34 Qls Tli Tgn1 Tgr2 Qag Qal 25 76 Mzgo Tpr Tgr Tgr1 Kpeg KJqdg? Qls 65 37 Tgn1 1 Twe 60 80 25 Tgr Tt Tlm Qal Tli Taw 259 70 65 30 2 Qb Tpr Qaf Kbtog 39 Qaf Tpr 178 Tpr Tim Tgr1 35 Tpr 42 Qaf Tgr Qls 210 Qls Qal 60 Tgn Tem Tpr Qaf 2 Tgr2 4 4 1 55 50 KJqdg 36 Tli Tpr Taw Qag Tcg 85 Qal KJqd Qal Twe Tli Tli 126 Tpr 199 Qal Qls 40 60 60 60 Tgr1 Qal Qls Taw Qls Qls 30 60 Tls 50 Kbtog 33 Qls 212 Qls 50 55 75 80 Tli 132 163 177 Qls Tgr2 35 62 70 Tp Tli Tli Tpr 200 Twe Tgn 60 70 Tem Qls Taw Qal 105 109 Tpr Qls 1 Ktr 10 45 75 Tpr? 71 Tpr 202 22 12 Qls Kbtog Qls Tgr Tgr2 Tgr1 316 83 55 Tcsc? 2 135 Tpr Qls Tgn Tpr 20 220 Tgr1 314 75 70 35 Tgr Tpr Tli 1 195Taw 256 1 Kbto 55 80 86 2 Qal Qaf Tli Tpr Tli Qls Qls 82 Taw Tli 166 Tgr2 3 Qal 30 50 60 Tgr Tli Qls Qls Tgr 340 56 KJqdg 2 Qls Twl Tt Tpr 3 1 Tgn 360 Kpeg 86 Taw Tgr2 1 50 62 Tli Tgn1 Qls Qls Qal 89 55 Taw 56 Qls Tli Qls Qls Tli 20 Tgr 67 Kbto 15 62 Mzgo Qaf Tli Tgr 147 Qls Tli Tli 1 Tp Qal 2 148 Taw Qal Tgn 45 35 86 Tcsc? Qls 72 Tli Qls 1 Twe 80 35 45 76 Qal Tpr Tli Qls 55 57 64 Tgr2 Tpr Tli Twl Tp 25 48 75 57 Qls 3 112 Qls 30 Tp Qal Qls 98 Tli 129 Tli 82 Tls? 60 Qaf 169 Qls 10 321 Mzqo? Qls Qls 122 131 3 W A H A Tgn Tif Tch 49 Tpr Tgr Tgn Tgr 1 362 72 Tlm Tli 2 Tpr 1 2 Tli Taw 3 Tgr Tgr Taw Tli Taw 2 1 KJqd Qal 72 Kpeg 80 75 Tli Tgn1 Tls? Qal Tpr Qls Qb Tli Tpr 193 KJpeg Tpr? KJqdg Mzqo 47 51 Tgr Twl? Taw 17 Tcg? 61 2 102 Tgr2 Tcg 61 Ktr Qls Tgr2 Tcg 1 29 5 80 70 2 59 419 Tlm Tpr Tpr Twl 4 Qal Tgr1 3 Qls Qls Qls Qal Tgr 382 39 Tgn Qb Tli Taw 77 Qls Taw 1 213 Tif Qls Kpeg 45 1 Kbtog Qls Qls 110 Qal Tli Tli 189 Qaf 44 KJqd Tpr? 70 65 Qaf Twl Tli Tif Tpr Qal 70 Tpr 73 4 1 Tcg Qls 65 426 Tpr Tgr Tpr Qag 39 56 Tgr2 Qls Tpr 2 Qls Tgr Qal 1 Tpr 75 Tpr Tli Qls 8 2 4 Tcg 74 69 30 Tgr Tli 13 Tgn 34 196 Qls 56 85 45 Tpr Tgn 2 Qls Qls 1Qls 197 22 74 1 Tgr 55 TRmb Tgn1 1-2 Tgn 2 Twl 80 Tcg? 85 PA 55 Tgn1 Tli 1 Qls 203 Tcg Tgr1 KJqd Qls Tli 164 Tgr2 Tim Tgn1 KJqd R 42 461 Tli Tli Tli Qal D Tgn Taw Taw Tcg 10 EE Qls 1 Qls Qls Tgn Qls Qal 226 Tcg 21 Qal 7 Qaf Twl Twl? Tgr Qls 1 83 Tpr 2 Qls Kbto KJdg Tls Qls Qls 179 Tgr1 Qal Qls 28 Tpr? Tli Tli 45 Qaf Tcg F 9 Qb Taw Tli Qls 272 305 2 Qal 352 64 AU 453 Tpr Tgn1 Tgr Qal Tgr 1 LT Tgr2 Qal Tgn Qls 2 Taw 1 Qaf 2 4 446 462 1 Taw 175 74 61 Qal Tgr Tli Qls TRmb Qb 62 2 Tli Tgn Qls Tgr1 Tgn Qls 1 80 83 1 Tp Tli Tgr2 Qls Qls Tgr Qal 88 Taw Twl Tgr 1 1 Qal 39 77 50 KJdg 2 176 KJqd 55 40 Tli Qls Tgn Tgr1 Tgr Twe 87 61 Tli 1 Qal 2 Tgn 1 396 Qls Qls 1 Tif Tgr 21 Qls Tgr Tli 100 4 173 Tgn1 Tcg 2 306 45 Tli 1 Tgr2 Tgr 289 87 45 KJqdg? Qls Taw Tgn Tgr Tgn1 Tgr 2 61 Kbto Mzqo 1 Qls 21 Taw 6 1 GASCO Tgn1 1-2 Twe 73 Qaf Taw 80 20 Tgr Tgn1 Qls 1 Coottonttonwood 401 60 1 Qal Tli 2 Twl Tcg 71 Qal 86 KJqd 7 187 291 Tif 1-26 Well 35 Qls 142 Tli KJqd 75 36 80 Qaf 4 Tli 146 8 155 Twe 85 Twl 159 JThR Tif Tcg Qal Qal 186 Tif 57 2 144 Qal Tgr2 Tgr Tgn1 FAULT 1 394 KPi Qal Qls Tgr Tgr 48 2 Tli Qls Tgn1 Tif 1 Tgr Tli Qls Taw Qls Qls Qls KJqd? 51 Qaf 1 Qls Tli Tgn1 Tgn Tgn 40 Tgr2 Qls 1 1 KJqd Tgr Tgn Tcg 53 Tgr 2 Tif 1 Qal Tgn1 1 Tcg 61 42 3 Tgr2 3 Twe Twe Tgr Tgr2 304 323 356 Tgn1 2 Tgr2 Twe Twe 43 Tgr JThR 56 Tif Tcg A Qls 1 JPg KJqd 84 Qal Qaf Taw Qls KJhqdt 418 83 Qls 1 62 Tif Tcg? 1-2 Tgn1 Tcg Twe 412 Qaf Qlsa KPd 70 Tgr 420 Qls Twl Qls JPg KJqd 1 Twe Qls Tgn1 99 Twl Qls 35 60 JPg 1 425 130 E S C A R P M E N T 73 73 46 Twe Qal Tgr1 Qaf Qal 75 70 Tgr2 70 55 Tgn 320 Tgr Tgn Qaf 83 273 Tif 1 2 Qls 2 Taw A 1 KJqd 8 <1 28 Tgr1 H Qls 67 43 Tcg? 2 Tli Tgr 116 A 167 32 Qls Tgr2 2 15 KJhqdt 342 Twe Qal W 2 160 JThR Qal 217 Tgn1 Tgr1 Qaf TRdc Tif Tif Qaf Tgr1 Tgn 1 Qal Twe 378 1 Tgr1 42 65 37 Tcg? Tli Qtg Twl Taw Tgn 15 236 2 Qaf Tli Qaf 28 1 Tgn1 1 Tif Tif 10 377 Twl JThR 80 Tgn Tgr Qal Qls Qls 1 Tgr 2 Tcg? Tli 78 Taw 8 Taw 65 44 Qls 2 Tif Tcg? Qal 93 139 74 Qal KJqd 80 Tgr1 Qls KJqd Tgr1 79 15 190 3 Tgr2 Tgr 68 Tif 281 Qls Tli 13 30 2 KJqd Qls Qaf Qaf 8 Qal Tif Tgn Tcg 6 10 30 20 1 Qls Tgr1 Qaf 20 75 55 188 Qal 121 Qal 85 Tgn1 Tif Tgr ? 15 14 50 75 Tgr2 Tif 1 37 Tgn1 Tif Tgr 19 Qtg 1 88 2 119 8 Taw 294 312 435 Qls Tgn1 103 80 9 Tif 1 Qls Twe? 4? 10 Qls 53 22 TRdc Tgr Twe Tgn 2 Tgn1 9 286 Tgn Tgn 358 Tgr 84 TRws 1 1 Qal Qal 1 341 Tgn 1 Tgn Tgr 1 70 Tgr 111 1 134 64 2 Tgn Qal Qal Twe KJqd 1 35 W A H A Tgr1 Tgn 1 1 Tif Qal Qls KJqd Ts Tgr 4 1 297 Qal Qaf 40 Tli 1 83 Tgr Qaf Qal Qal Tgn1 Tgr KJqd 1 440 52 1 403 TRPsd 80 Qls 26 280 KJqd 391 Qls Trk? Qaf Tgn1 61 Tgr Tgr Tim 2 Tgr 300 364 1 Tak KPi 80 Tgr 85 2 344 2 Qls 80 246 292 Ton 80 Qal TRws Taw Qal Qal 423 Tgn1 35 75 3 265 1 Qal 365 389 91 85 Tak 404 TRPsd JThR Tif 60 TRws Taw Tgn1 Tgn Tak KPi Qaf Qal 184 301 1 Qls 1 TRdc? Qal Tgn Qal 392 Tim 60 218 1 287 Tif Tli 180 215 Tbrk 20 Qaf Tgr Qls Tli Tgr 2 295 Trk? 55 Taw 2 161 Tgr 80 Tim 137 Tgn1 2 Tgv 384 Qls Qal 60 Tcg? Tak Tgn1 Twe KPd Tgr1 81 345 KJqd 25 Taw Qal Tli 45 Qag Tgn Tgn Qls 45 2 1 141 268 1 1 Qls 4 24 85 Tgn Qaf Qal 1 251 KJqd 333 Tgn 4 70 KJqd 77 335 Tgr Tcg 405 1 Tli TRPsd 1 Tli? 3 85 Tim 172 234 74 64 Tgr Qal 88 86 Tgr LIMEKILN Qal 1 86 Tgn1 1 Tgr2 3 Tcg 385 FAULT 5 Tim Tgr 31 Twe? Twe Tli Qls Qal 2 78 359 406 427 Twe 90 92 Tgr2 Tif 411 Tlm Qaf KJdg 68 KJqd Qal 228 Tgn 82 84 Tcg Qal Tli Qal 1 75 Tcg 465 69 422 Qls 82 366 399 Tak Qaf TRPsd KJdg Tgv Tgr KJqd 22 334 Trk Twe 20 Qls 1 Qal 86 76 58 52 TRPsd Tgn1 89 77 416 Tgr1 33 82 54 78 KPi Tcg? Twe Taw Qaf 89 KPd Taw Tgn1 83 79 Qb 72 49 81 Tgn Twe 10 Qal 1 35 74 88 69 83 346 43 Taw? Tgr Qal 74 1 149 80 KJfqd 20 JThR 235 Tgn 57 KPd 80 Tgr Taw 1 Tcg Tcg 467 30 1 Taw KJqd KJhqdt Taw? Qls 239 74 70 23 Tcg? Qag 80 Tgr Tgr2 267 26 KJqd Twe 5 1 Tgn 40 78 156 1 77 Tak 43 469 C’ Qaf Qls Tgr2 79 KJhqdt Tcg? JThR 96 270 83 74 60 Qal Tgr2 86 77 23 Qag 60 TRmb Tgn1 1 97 74 TRPsd? Taw Qal 85 Tgr2 72 Qal Qls Tgn1 Tgn1 47 374 Qaf 25 Tgn1 JPap 80 Tim Qal Tak Tgr1 Qal 6 48 Tgr1 KJdg 350 Tgn1 64 357 24 379 7 Tgn TRPsd KJhqdt 80 Qag Tgn 1 Tak 25 1 76 88 KJhqdt 7 Tgr1 Qaf TRmb 27 Tgn 363 42 Qls 81 88 310 1 351 58 2 C 20 50 JPap KPi Tgr1 Tgr2? Tim 42 TRws? JPap Tcg Qal Tim 79 58 Tak? 65 JPap JPap 22 Tgr1 417 Qaf 79 49 Tgn1 413 Jch Tgn1 Tgr 69 23 KJqd Tgr1 58 1 32 108 JPap Tgn1 KPi 463 72 Tgn Tgr 84 86 Tcg? Qls 113 1 2 75 75 Tgr1 Taw 468 Qaf 32 79 106 Qls 69 343 65 Qls? Tgr1 Qal R 88 7 Tdc TRwsm Qls TRws? 82 83 63 50 Qls 81 81 84 71 JPap 77 66 Tim 80 Twe 7 Jch 45 70 Qal Tab Tgr1 JPap 84 Tgv? 8 KJqd Tgr 29 318 Qal 1 Tgr 1? Tgr1 80 Qls 86 60 Tgn 60 74 1 431 Tli 30 80 Tgn1 Qal 50 KJqd 72 48 5 85 Tgn1 KJdg 76 41 Qaf Qal 78 Tgv? 445 Tim TRws Tgn 55 35 73 41 1 TRws 83 86 Tcg 443 Tgr1 86 81 95 72 2 Qls 57 74 74 293 Tcg KJdg Tlm 118 1 208 Tim 1 Tgn Taw Qls 78 303 Tgv 1 Qal 46 4 Qls Tgr2 Tgr1 83 83 FAULT Qal Taw 115 Qls Tgr2 430 49 206 Qaf Tgr1 87 Tgv 371 KPi Qls 70 15 336 353 381 428 Tgn1 JPap Qaf 89 70 KPd Qaf 85 330 Qal 386 466 101 Tgr1 KJqd 80 395 Qal TRws 56 Tlm Qaf 74 3 1 415 Qal TRdc? 11 Qal KPd 398 56 Tim TRdc Qaf Taw 24 Tgr1 Tim Tgr1 Qaf 66 370 5 40 3 Tim Qaf Qls 76 436 Taw 455 KJqd 65 TRPsd 40 Tgn 77 JPr Tgv Tgn1 TRdc Tgn1 1 261 277 Tgv 36 Tim 77 1 339 457 10 39 Tgv Tgv 433 447 Tli 65 40 Tim Tgr Qls 78 1 65 5 Tcg Qaf 1 CREEK Tgn Qls 40 87 Tgr2 299 308 Qal 1 47 Qls KJqd 52 354 Tcg? Twe? 470 Qal Tgn1 Tim 79 Qls 4 Tgn1 424 TRdc? 58 Tim Tgn 2 Tgn Tgr2 Qaf Tgr 79 1 Tgv 1 Tim 1 274 Tgv Twe Tgr1 TRdc Qls 451452 52 Qaf Tgr2 Tgn Jch? Tim KJqd 264 275 96 1 2 Tgv Twe 2 E 7 KJqd 52 Qal Tcg 2 43 448 Tgr Qal V KJdg 2 Tgn1 Tgv? 1 439 444 Tli Taw? KJdg KJdg A Jch 39 Qls Tgr1 Tli 75 Qal 449 R Tgv 9 KPd 65 64 6 Tgr Qaf Tli Tgn KJqd 32 Tpr 5 57 46 1 1 56 Tgn1 1 31 8 Tim KJqd Tgr KJqd 67 G Tgv? Tgv 1 Tli KJqd 45 Tgr1 Tim Tli 1 Tgr Tgr2 Tgr Tgr2 Twe Tgv Twe? KPd 66 1 18 89 2 15 Tgv Tgv 376 Tcg Tgv 1 Twe Qb 24 Jch Qag Qal Tim 52 Tgr1 B’ SCALE 1:100,000 Orofino base map from digitally scanned USGS 1:100,000 composite film base, 1981. Clarkston part of MN Field work conducted 2002-2005. 1 0 12345 1 0 12 3 base map from scanned USGS 1:100,000 paper base, 1981. KILOMETERS MILES This geologic map was funded in part by the USGS National Cooperative Geologic Mapping Program. Projection and 10,000-meter grid, zone 11 (Orofino) and zone 11 (Clarkston): Universal Transverse Mercator GN Reviewed by Steve Reidel, Washington State Universtiy - Tri Cities, Richland, WA 99354 and Mark Ferns, o o Contour interval 40 meters (Orofino part), 25,000 foot grid ticks based on Idaho coordinate system, west zone (Orofino) and on Washington coordinate 0 22 19 Oregon Department of Geology and Mineral Industries, Baker City Field Office, Baker City, OR 97814. system, south zone (Clarkston). 50 meters (Clarkston part) Digital cartography and GIS data capture by Jane S. Freed, Jesse S. Bird, IDAHO 1927 North American Datum. Loudon R. Stanford, and E. Benjamin B. Studer. National geodetic vertical datum of 1929. Map edited by Roger C. Stewart. QUADRANGLE LOCATION Map version 11-25-2009. UTM grid convergence (GN) and 1981 magnetic declination (MN) Note on printing: The map is reproduced at a high resolution of 600 dots per inch. The inks are resistant at center of the Orofino 30’ x 60’ to run and fading but will deteriorate with long-term exposure to light. PDF map (Acrobat Reader) may be viewed at www.idahogeology.org. G EOLOGIC M AP OF THE I DAHO PARTS OF THE O ROFINO AND C LARKSTON 30 x 60 M INUTE Q UADRANGLES

Mapped and compiled by John D. Kauffman, Dean L. Garwood, Keegan L. Schmidt, CORRELATION OF MAP UNITS Reed S. Lewis, Kurt L. Othberg, and William M. Phillips 2009 Artificial Sedimentary Volcanic Rocks and Deposits Deposits Associated Dikes m Qal Holocene MAP UNITS Qaf Qls Ql Qm 13,000 years Qag Qtg Qb 14,500 years QUATERNARY See accompaning booklet for complete descriptions. Pleistocene Tch Tclg Columbia River Basalt Group ARTIFICIAL DEPOSITS Pliocene Latah Formation Saddle Mountains Basalt ? Made ground (Holocene) Tlm Tlm m Tt CENOZOIC Tcsc SEDIMENTARY DEPOSITS Tem Tcg Younger Alluvial, Eolian, and Tp Twe Tgv Landslide Deposits Twl Twl Qal Alluvial deposits (Holocene and Pleistocene) Tls Taw Wanapum Basalt Alluvial fan deposits (Holocene and Pleistocene) Tli Miocene NEOGENE TERTIARY Qaf Tpr Tpr Landslide deposits (Holocene and Pleistocene) Tif Tab Qls Grande Ronde Basalt Ql Loess deposits (Holocene and Pleistocene) Pattern only; superimposed on Tgr22Tgr bedrock. ? Tgn1 Tgr1 Older Allluvial Deposits and Sediments Imnaha Basalt Alluvial gravel (Pleistocene) Tim Tim Qag Terrace gravel deposits (Pleistocene) Potlatch Volcanics Kamiah Volcanics Qtg Tak Tak Oligocene Tclg Clearwater gravel (late Pliocene) Ton Tbrk Trk Tch Clarkston Heights gravel (late Pliocene) ? PALEOGENE ? Catastrophic Flood Deposits Tpd Eocene Qm Missoula Floods backwater deposits (Pleistocene) Pattern only. ? Qb Bonneville Flood deposits (Pleistocene)

Intrusive Rocks Island-Arc Metasedimentary Latah Formation and Metavolcanic Rocks Tls Latah Formation sediments (Miocene) Wallowa Terrane KJqd Orofino Series CRETACEOUS Ktt Kbto Kbtog Ktr Kpeg Tli Latah Formation interbeds (Miocene) KJhqdt KJfqd KJdg KJqdg JPap KJpeg Jch JURASSIC KJqd VOLCANIC ROCKS Mzao Mzgo Mzcso Mzmo Mzqo AND ASSOCIATED DIKES JThR MESOZOIC Simplified structure map of the Idaho parts of the Orofino and Clarkston 30 x 60 minute quadrangles and surrounding area. KPd KPi Columbia River Basalt Group TRmb JPg JPr TRIASSIC Saddle Mountains Basalt Seven Devils Group Lower Monumental Member (Miocene) TRdc Tlm Kamiah Volcanics ISLAND-ARC METASEDIMENTARY AND METAVOLCANIC ROCKS TRPsd TRws TRwsm Tt Basalt of Tammany Creek (Miocene) Tak Andesite (Oligocene) JPap Elephant Mountain Member (Miocene) Wallowa Terrane Tem Volcanic breccia (Oligocene) PERMIAN PALEOZOIC Tbrk Continental Jch Coon Hollow Formation (Jurassic) Tcsc Basalts of Craigmont and Swamp Creek, undivided (Miocene) Metasedimentary Rocks Trk Rhyolite (Oligocene) JPr Rhyolite tuff (Jurassic and Permian) Syringa Metamorphic Sequence Tcg Basalt of Craigmont INTRUSIVE ROCKS Zss NEOPROTEROZOIC PRECAMBRIAN Hurwal Formation (Jurassic and Triassic) Tp Pomona Member (Miocene) J h Andesite and basalt dikes, undivided (Miocene to Eocene) Tab Martin Bridge Limestone (Triassic) Twe Basalt of Weippe (Miocene) mb Tpd Porphyritic dacite dikes (Eocene?) Tgv Basalt of Grangeville (Miocene) Seven Devils Group MAP SYMBOLS 34 Strike and dip of basalt flows or compositional layering interpreted as bedding. Strike of vertical magmatic foliation. Kpeg Pegmatite and aplite dikes (Cretaceous) Weissenfels Ridge Member (Miocene) Psd Seven Devils Group, undivided (Triassic and Permian) Strike of vertical bedding. Bearing and plunge of lineation, type unknown. Contact: approximately located. 40 Intermediate Initial 87Sr/86Sr Intrusions Horizontal basalt flows or bedding. Twl Basalt of Lewiston Orchards (Miocene) dc Doyle Creek Formation (Triassic) 5 Bearing and plunge of mineral lineation. Normal fault: dashed where approximately located; dotted where concealed; Ktt Biotite tonalite and hornblende-biotite tonalite (Cretaceous) ball and bar on downthrown side. 52 Strike and dip of bedding; ball indicates bedding known to be upright. Bearing and plunge of lineation in L tectonite. Taw Asotin Member and Wilbur Creek Member, undivided (Miocene) ws Wild Sheep Creek Formation (Triassic) 25 87 86 Strike-slip fault on cross sections; “A” indicates movement away from observer, Low Initial Sr/ Sr Intrusions A Approximate strike and dip of basalt flows based on regional trends. 20 Bearing and plunge of mylonitic lineation. Wanapum Basalt wsm Wild Sheep Creek Formation, marble (Triassic) T “T” indicates movement toward observer. 1 Ktr Biotite-muscovite trondhjemite (Cretaceous) 23 Strike and dip of foliation. 36 Bearing and plunge of small fold axis. Priest Rapids Member (Miocene) Thrust fault: dashed where approximately located; dotted where concealed; Tpr Orofino Series Biotite tonalite (Cretaceous) teeth on upper plate. Strike of vertical foliation. Bearing and plunge of asymmetrical small fold showing Kbto 18 Tif Basalt of Icicle Flat (Miocene) Mzao Amphibolite (Mesozoic) counterclockwise rotation viewed down plunge. Fold axis: dotted where concealed; arrow indicates plunge direction. Strike and dip of mylonitic foliation. Kbtog Biotite tonalite gneiss (Cretaceous) Grande Ronde Basalt Gneiss and schist (Mesozoic) 40 Vein. Mzgo Syncline. Strike and dip of foliation that varies at outcrop scale. KJpeg Pegmatite and aplite dikes (Cretaceous or Jurassic) 65 Grande Ronde Basalt, R magnetostratigraphic unit (Miocene) Calc-silicate gneiss and granofels (Mesozoic) Breccia. Tgr2 2 Mzcso Anticline. 20 Strike and dip of cleavage. KJhqdt Hornblende quartz diorite and tonalite (Cretaceous? or Jurassic) No fabric. Tgn Grande Ronde Basalt, N magnetostratigraphic unit (Miocene) Mzmo Marble (Mesozoic) Monocline. Strike of vertical cleavage. 1 1 KJqd Biotite-hornblende quartz diorite and quartz diorite (Cretaceous or Jurassic) 228 52 Sample location and number. Tgr Grande Ronde Basalt, R magnetostratigraphic unit (Miocene) Mzqo Quartzite (Mesozoic) Monocline: anticlinal flexure; shorter arrow indicates steeper limb. Strike and dip of flow banding and flattened pumice. 1 1 KJqdg Quartz diorite gneiss (Cretaceous or Jurassic) Mylonite. Imnaha Basalt Monocline: synclinal flexure; shorter arrow indicates steeper limb. 72 Strike and dip of magmatic foliation. Island-Arc Rocks, Unassigned KJfqd Fine-grained hornblende quartz diorite (Cretaceous? or Jurassic) Tim Imnaha Basalt (Miocene) JPg Gneissic and hornfelsic rocks (Jurassic to Permian) KJdg Diorite and gabbro (Cretaceous or Jurassic) Potlatch Volcanics CONTINENTAL METASEDIMENTARY ROCKS Dike rocks, undivided (Cretaceous? to Permian?) A Ahsahka A’ KPd 2,000 Little thrust 2,000 Ton Onaway Member (Oligocene) Canyon Tcsc Syringa Metamorphic Sequence GASCO fault Creek Clearwater Lolo Twe KPi Plutonic rocks, undivided (Cretaceous? to Permian?) Tif Tgn Cottonwood Tgn Tgn KJqdg 1 1-26 Well 1 River Creek Taw Tgn1 1 Qls Twe Zss Schist and gneiss (Neoproterozoic) Qal Tgr Tgn1 Kbtog Tpr 1,000 1 1,000 Tgr1 METERS JPap Andesite porphyry (Jurassic to Permian) Tgr1 Tgr1 Tim Tak? Tim

METERS Tim 0 JTR h? KJqd Mzgo 0 KJqdg Mzgo? KJqd Ktr KJqd? TRmb? TRPsd? mylonitic TD 1,736 m foliation KJqdg -1,000 -1,000

LEWISTON HILL WAHA LEWISTON C - C’ B ESCARPMENT ESCARPMENT B’ 2,000 SYNCLINE Waha Tgr 2,000 Tgr2 Tgn1 2 Tgn Tgr fault Tgr 1 2 Tgn Tgr2 Lewiston Hill Sweetwater Taw Tgr2 Tgn1 2 1 Wilma Clearwater Tgr Salmon anticline Creek Tli Taw Tli 2 Qls Tgn1 Tgr thrust River Qls River 1 Taw Tpr Taw Tli Tpr Tgr2 Taw fault Tli 1,000 METERS 1,000 Tli Tpr Tgr Tp Tgr1 Tgr2 Tgr Twl 2 Tpr 2 Qal Tpr Qal Qls TRdc Tim Tim Tgn Tim 1 Tim Jch Tgn1 Qal TRws METERS Tgn1 Tim 0 Tgr1 0 Tgr1 JPap inferred TRws mylonitic KJqdg? Tgr1 Tgn1 Tim KJqd Mzgo? JTR h? JTR h TRws Zss? KJqdg? foliation KJqd? TRws? TRdc bedding Tim TRdc? A T -1,000 -1,000 Note: Basement geology beneath Lewiston basin inferred from Ahsahka-Orofino area. B - B’ C Tgr C’ 2,000 2 Tgn Maloney Creek 2,000 1 Tgr Tgr2 Tgr Tgr Tgr2 Twin Buttes Tgn 2 Tgn1 Tgr2 2 1 Tgr Qal KJfqd 1 Tgn1 1 Tgr2 Tgr2 Qal Tgn 1 Tgn1 Tcg Tcg Tcg Tgr1 Taw Twe Twe Snake River Limekiln fault Tgn1 Tgn1 Tgn1 Taw 1,000 Tgr Tgn 1,000 METERS Tgr 1 Tak 1 1 Jch Tim TRPsd Qal Tim Jch Tim Trk TRdc? Tgr1 Tgn1 R TRmb TPsd TRPsd METERS Tim TRdc? Tim? 0 Tim TRws KJqd 0 JPap KJqd KJhqdt TRws KJqd TRws TRdc inferred TRws? JPap KJdg KJhqdt? TRws bedding KPi? KPi? A T -1,000 -1,000

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