1. Rocks from Aroostook County. 2. Litchfieldite and associated minerals 1. Rocks of the Connecticut Valley.. 1. Rocks of the Adirondack region 2. Peridotite from near Syracuse Maryland, District of Columbia. 1. Peridotite and pyroxenite . 1. Marquette region, Michigan.. 2. Crystal Falls district, Michigan 6. Miscellaneous rocks from Minnesota South Dakota Wyoming... Yellowstone National Park and the Absaroka Range.. 1. Electric Peak... 2. Sepulchre Mountain 3. Absaroka Range First. Crandall Basin.. Second. Sunlight intrusives. Third. Ishawooa intrusives Fourth. Dikes in breccia.... 4. Absarokite-shoshonite-banakite series 5. Miscellaneous rocks. Montana 1. Madison and Gallatin valleys. 2. Butte and Boulder districts. 3. Crazy Mountains 4. Little Belt Mountains. 5. Castle Mountain district.. 6. Highwood Mountains. 7. Little Rocky Mountains. 8. Bearpaw Mountains... Idaho Colorado 1. Denver Basin.. 2. Pikes Peak district.. 3. Silver Cliff and Rosita.. 4. Buffalo Peaks 5. Leadville region. 6. Tenmile district 7. Elk Mountains 8. West Elk Mountains. 9. San Juan region 10. Miscellaneous rocks. Utah 1. Rocks from the Tintic district 2. Rocks from the Henry Mountains 3. Miscellaneous rocks. New Mexico ... 1. Basalts from the Rio Grande ('anyon. 2. Mount Taylor region.. 3. Colfax County. 4. Miscellaneous rocks.. Arizona... Nevada 1. Rocks from Washoe. 2. Rocks from Eureka. California... 1. Mount Shasta 73 76 81 S4 85 87 87 90 92 92 95 96 97 99 104 111 111 116 120 124 129 131 134 135 137 1-10 110 141 147 153 154 157 159 160 161 1 164 166 166 167 168 169 169 170 171 172 173 174 174 175 176 176 Igneous and crystalline rocks—Continued. 6. Nevada City and Grass Valley. 4. Rock from Wilbur, Douglas County. 3. Winnebago County, Illinois. 8. Bluff, Fayette County, Texas... 9. San Bernardino County, California 10. Beaver Creek, British Columbia .. Sandstones, cherts, and sinters. Page. Analyses—Continued. Georgia. 1. Coral and shell rocks 2. Miscellaneous rocks.. 1. Denver Basin.. 6. Tenmile district. Hawaiian Islands. Vermont California... Massachusetts.. California, Washington, Hawaiian Islands 255 255 255 257 258 259 259 262 263 263 264 268 269 270 270 271 272 272 273 274 275 276 277 278 278 281 283 284 284 285 286 287 289 289 290 291 292 293 293 295 296 297 298 299 302 303 301 305 LETTER OF TRANSMITTAL.' DEPARTMENT OF THE INTERIOR, Washington, D. C., February 27, 1900. Sir: I submit herewith the manuscript for a revised and enlarged edition of Bulletin No. 148, entitled Analyses of Rocks, etc. Dr. Hillebrand's portion of the former bulletin is so much extended, and represents so distinct a demand, that it will be presented by him as a separate bulletin. Very respectfully, F. W. CLARKE, Chief Chemist. Hon. CHARLES D. WALCOTT, Director United States Geological Survey. 9 |
