CONTENTS 7 
Analyses — Continued. Page. 
[gneous and crystalline rocks — Continued. 
( California — Continued. 
2. Lassen Peak region 177 
First. Ehyolites 1 78 
Second. Dacites and andesites 17!) 
Third. Basalts 184 
3. Plumas County 187 
4. Butte County 190 
5. Sierra County 192 
6. Nevada City and Grass Valley 194 
7. Placer County 197 
8. Eldorado County 199 
9. Amador County 200 
10. Calaveras County 203 
11. Tuolumne County 203 
12. Mariposa County 207 
13. The quicksilver region 211 
14. Mount Diablo 213 
15. Miscellaneous rocks 217 
Oregon 220 
1. Basalt, Mount Thielsen 220 
2. Peridotite, Douglas County 221 
3. Crater Lake 221 
4. Rock from Wilbur, Douglas County 223 
Washington 224 
Alaska 226 
Brazil 230 
Stony meteorites - 231 
1. Rockwood, Tennessee 231 
2. Hamblen County, Tennessee 232 
3. Winnebago County, Illinois 233 
4. Taney County, Missouri 234 
5. Washington County, Kansas 234 
6. Kiowa County, Kansas 235 
7. Travis County, Texas 236 
8. Bluff, Fayette County, Texas 237 
9. San Bernardino County, California 238 
10. Beaver Creek, British Columbia 239 
11. Llano del Inca, Chile 240 
Meteoric iron 241 
Sandstones, cherts, and sinters 244 
Ohio 244 
California - 245 
1. Mount Diablo - - 245 
2. Shasta County 246 
3. Sulphur Bank 247 
Miscellaneous sandstones 248 
Chert 250 
Siliceous sinters 251 
Carbonate rocks 252 
Vermont, Massachusetts - - - 252 
New York, Pennsylvania, Maryland 253 
Virginia, West Virginia 254 
