Index 



Saragossa quartzite, 344, 350, 357 ff. ; 



figures of, 351, 358, 359. 

 Schaaffhausen, cited, 50. 

 Shear joints, 264. 



Schists, undifferentiated, of San 

 Bernardino Mountains, 345 ff.; 

 northeast of Beaumont, Califor- 

 nia, 345; of San Gorgonio Eiver, 

 346; on south side of San Ber- 

 nardino Mountain, 347. 



Schist series of Cuyamaca region, 

 section through, 186; origin of, 

 187. 



Schorlemmer and Roseoe, quoted, 296. 



Sclater, P. L., cited, 99. 



Scutella breweriana beds, 134. 



Secondary enrichment, as explana- 

 tion of vein genesis at Cobalt, 

 279. 



Segregation according to Soret's 

 principle, as applied to pyrrho- 

 tites of Friday Mine, 238. 



Serres, M., and Gervais, P., cited, 75. 



Ship Mountains, California, absence 

 of fossils in, 2. 



Silicate and sulphide melts, limited 

 miscibility of in Friday Mine 

 deposit, 239. 



Siliqua alisoensis, description of, 427; 

 figure of, opp. 454. 



Sillimanite gneiss of Cuyamaca re- 

 gion, 184. 



Simonelli, V., cited, 72. 



Sinum (Sigaretus) trigenarium, de- 

 scription of, 153; compared with 

 S. scopulorum and S. trigenar- 

 ium, 153, 154; figures of, opp. 

 172. 



Siphonalia dubius, description of, 



431; figure of, opp. 456. 

 rodeoensis, description, 155; com- 

 pared with S. danvillensis, 

 155; figures of, opp. 172. 

 Smart's Ranch, California, section 



south of, figure of, 357; section 



southeast of, figure of, 393. 

 Smith, J. A., Mitchell, S. L., and 



Cooper, W., cited, 50. 

 Smith, J. P., quoted, 189. 

 Snow Creek, California, alluvial fans 



at, 341. 

 Spirifer roekymontanus, 6. 

 Spisula falcata brioniana, description 



of, 152; compared with S. falcata. 



152; figures of, opp. 166. 

 Split joints, 266; at Cobalt, 276. 

 Spondvlus rugosus, description of, 



422; figures of, opp. 440, 446, 



448. 



striatus, description, 422 ; figure of, 

 opp. 444. 

 Stage Station, California, 35. 

 Stanford University, Briones Collec- 

 tion, 135. 



Standaehner, F., cited, 74. 



Stock, Chester, 9, 19, 311. 



Stonewall quartz diorite of Cuyamaca 

 region, 191. 



Strand, Young, and Pease, cited, 241. 



Stromer, E., cited, 76. 



Stubby Canon, overthrust on east 

 side, figure of, 399. 



Subaerial Front, 338. 



Suballuvial Bench, 338. 



Sugarloaf Mountain, California, lime- 

 stone of, 355. 



Sulphide minerals of Friday Mine, 

 relationships between, 219. 



Sulphide magma, intrusion of at Fri- 

 day mine, 239. 



Sulphides: at Friday Mine, relation 

 of to rock alteration, 220; rela- 

 tion of to total composition of 

 rocks, 200 ft'.; disseminated, of 

 Cuyamaca Basic Intrusion, 218; 

 at Friday Mine, origin of, 224. • 



Targioni-Tozzetti, G., cited, 77. 



Tchihatcheff, P. A., cited, 49. 



Tehachapi mountains, California, 324. 



Tehachapi Pass, California, 324. 



Tellina sp., description of, 427; figure 

 of, opp. 452. 

 alisoensis, description, 426; com- 

 pared with T. ashburnerii 

 Gabb, 426; figure of, opp. 452. 

 santana, description, 426; figure of, 

 opp. 452. 



Tenne, C. A., and Jentzsch, A., cited, 

 79. 



Tertiary formations of San Bernar- 

 dino Mountains, 374 ff. 



Thompson, D'Arcy W., cited, 81. 



Thompson, R. B., cited, 81. 



Timiskaming fault, 278. 



Timiskaming Series, 254. 



Tiptop Mountain, California, 333. 



Tivela merriami, description of, 151; 

 figures of, opp. 170. 



Tolman, C. F., Jr., and Rogers, A. F., 

 cited, 228; quoted, 236, 237. 



Toula, F., cited, 60, 73. 



Tower, W. F., cited, 57. 



Trask, Parker D., 133. 



Trichecordon, 102. 



Trigonarca Californica, description, 

 418; compared with Cucullaea 

 decurtata, 418; figures of, opp. 

 436. 



sectilis, description, 419; figures of, 



opp. 438. 

 excavata, description, 418; com- 

 pared with T. brahminica and 

 T. californica, 418. 

 Trilobites, in Lower Cambrian of 



Bristol Mountain, 6. 

 Troetolite of Cuyamaca region, de- 

 ' scription of, 198. 



[422] 



