Index 



San Pablo, fauna of Mt. Diablo region, 

 115. 



San Pablo formation, 295. 



San Pedro Pliocene fauna, 48. 



Sandstone, in Mariposa formation, 

 391, figure of, 420; oil-bearing, in 

 Grass Valley, Wyoming, 454. 



Santa Cruz ground sloths, 164, 282, 

 284, 286. 



Santa Margarita Beds in the North 

 Coalinga Region of California, 

 Fauna of the, 293; relation to 

 other formations, 296; lithologic 

 section of, 298, figures of 298; 

 list of fauna of, 300; list of fauna 

 of Santa Margarita northeast of 

 Coalinga, 299. 



Santa Margarita formation, relation 

 to Etchegoin, and other forma- 

 tions, 200, 201, 228, 296, 297; once 

 considered a division of the San 

 Pablo, 294; described from San 

 Luis Quadrangle, 294; palaeon- 

 tology of, 295; terrestrial deposits 

 above, 297; fauna of, in San Luis 

 Quadrangle, 302, in the Tejon 

 Hills, 302, from the type section, 

 303, from Nacimiento River, 304. 



Santa Margarita Upper Miocene, 115. 



Sargent, California, Pliocene beds near, 

 225, 227, 228. 



Sayles, R. W., cited, 404. 



Scapanus, possibly new species, 478. 



Scaphiopus h. hammondii, 289. 



Scapolite, 350. 



Scelidotherium, 275, 281; comparison 

 of Mylodon harlani with, 280, 

 283, 284, 286. 

 magnum, 280. 



Schansi fauna of China, 442. 



Scott, W. B., cited, 138, 152, 162, 282, 

 283. 



Seine series, Great Lakes Region, 7; 

 area covered by, 7; cut by granite 

 and granite greiss, 7; evidence of 

 batholithic invasion, 7; rests upon 

 complex, 7. 



Seine slate, 10. 



Sellards, E. H., cited, 422, 439, 532. 



Semele fausta, 233; figure of, 249. 



Septifer margaritana, 308; plate show- 

 ing, 325. 



Serpentine, 334, 387. 



Serpula (?) reef in Etchegoin, 216, 239, 

 figure of, 239. 



Seven Devils, Idaho, contact deposits 

 at, 28. 



Shaler, N. S., cited, 403. 



Shastasaurus osmonti, figure of an- 

 terior limb of, 68. 



Shoshone Mountains, rivers rising in, 

 448. 



Siamo slate, 9. 



Sierra Nevada, date of uplift, 85; 

 amphibolite belt of, 386. 



Silurian, use of term, 16. 



Silverbell, Arizona, ore deposits at, 27. 



Sinclair, W. J., cited, 138, 513. 



Siphonalia danvillensis, plate of, 327. 

 gilberti, 51; figures of, 61. 



Skull and Dentition of Nothrotherium 

 from Rancho La Brea, Recent 

 Studies on the, 137. 



Skull Structure of Mylodont Sloths 

 from Rancho La Brea, Further 

 Observations on the, 165. 



Sky Blue Hill, California, 329-332, 

 334-353 ; plate showing, 354. 



Slate, Hanbury, Siamo, and Tyler, 9; 

 Seine, and Knife, and Mich- 

 igamme, in Mariposa formation, 

 389, 390; figures showing boulders 

 in, 418, 420. 



Slover Mountain, near Colton, Califor- 

 nia, remnant of limestone body, 329. 



Smilodon, 104, 480; in Hawver Cave, 

 467, 470; figure of, 481. 

 californicus, 524. 



Smith, G. O., cited, 257. 



Smith, J. P., cited, 223, 399. 



Snake Creek, fauna, 422, 435, 437. 



Solen sicarius, 203. 



South American mylodont sloth, 169. 



Spade-foot toad, 289. 



Sphalerite, 353. 



Spherulites, plates showing, opp. 381. 



Spitzbergen, marine Triassic reptiles 

 of, 53, 64. 



Stearns, R. E. C, cited, 41. 



Steeprock Lake, geologic district, Great 

 Lakes region, 6; correlation of, 5. 



Stegodon, 435, 438. 



Stock, C, 87, 137, 165, 267, 461. 



Stoner, R. C, cited, 112, 125. 



Strata Referred to the Ellensburg 

 Formation in the White Bluffs of 

 the Columbia River, Age of, 255. 



Stream valleys, present, superimposed, 

 upon pre-Recent, 363. 



Strongylocentrotus, 47. 



Structure of the Pes in Mylodon 

 Harlani, 267; details of structure, 

 268; comparison with other my- 

 lodont genera, 278, with Lestodon, 

 279, with Scelidotherium, 280; 

 modification and specialization of, 

 282; relation of mylodont pes to 

 supposed human footprints in 

 Nevada, 284. 



Sturgeon quartzite, 8. 



Sudbury. See Temiskamian. 



Sulphide minerals, 352. 



Sulphide-rich solutions later than those 

 forming lime-silicates, 36. 



Sulphides, genesis of, 36. 



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