Index 



sp., ? figure of, 564. 

 tabulatus, 189; figure of, 198. 

 var. colmaensis, 188; figure of, 198. 

 baird, 189. 



Cidaris, sp., 51; sp., a, 121; sp., c, 

 121; figures of, 156. 



Circulation, of ground waters, 221 , 

 222; lateral movement, 226; ris- 

 ing meteoric waters permeating 

 the hot igneous mass, 226; hydro- 

 thermal, 229. 



Clark, B. L., 365, 385. 



Clifton-Morenci district, 228, 229, 

 230, 233, 239. 



Clvpeaster bowersi, 50; figures of, 

 58, 60. 



carrizoensis, 49; figures of, 54. 

 deserti, 49; figure of, 56. 

 gabbi, 390. 

 Cockerell, T. D. A., 320; cited, 320, 



326, 330, 331. 

 Coleman, cited, 8, 9, 10. 

 Colorado Desert, California, 39; map 



of southwestern portion, 41. 

 Comstock, Virginia City, Nevada, ore 



deposition at, 226. 

 Columbella kirkensis, 492; figure of, 

 568. 



Connate waters, 241. 



Conrad, T. A., cited, 40. 



Contact, transgressive, 227. 



Contact deposits, 223. 



Contact porphyry, association of, 



with synclinal structure, 240. 

 Contact zones, ore bodies in, not 



characteristic of batholiths, 232. 

 Conus hayesi, 269. 

 Cooper, J. G., cited, 258. 

 Cope, E. D., cited, 319, 320, 330, 331. 

 Copper Ores at Ely, Nevada, Notes 



on, 309. 



Copper ores, in monzonite-porphyry, 

 310; migratory descent of salts 

 of, 236. 



Corbula, 264. 



Cosmacanthus, 29. 



Coyote Mountain, Colorado Desert, 

 California, 39, 40, 42, 44. 



Crassatellites brainerdi, 300; figure 

 of, 304. 



claytonensis, 131; figures of, 164. 



stewartvillensis, 130; figure of, 164. 



studleyl, 129; figure of, 164. 



unioides, 264, 300; figure of, 164. 



cf. uvasana, 265. 

 Crenel! a santana, 258. 

 Crepidula pabloensis, 485; figures of, 

 570. 



Crystallization, shrinkage due to, 

 224. 



Ctenaeanthus, 29. 

 Cucullaea bowersi, 258. 



mathewsonii, figures of, 158. 



Cuspidaria dolabraeformis, figure of, 

 162. 



hannibali, 129; figure of, 162. 

 Cylichna costata, 266. 

 Cypraea bayerquei, figure of, 174. 

 Cyrena (Corbicula) ealifornica, 459; 



figure of, 542. 

 Dall, W. H., classification of, 182; 



cited, 66, 117, 182, 246, 438. 

 Daly, cited, 5, 7. 



Dentalium cooperi, figure of, 168. 



Deposition of ore, methods of, 221; 

 in inclusions and salients, 227. 



Deposits, contact, 223; high tempera- 

 ture, 222. 



Devil's Punch-bowl, Rock Creek 

 Quadrangle, California, 295; 

 fault, 292. 



Devonian, 309. 



Dickerson, R. E., 17, 61, 257, 289, 



299; cited, 68, 299. 

 Diomedea, 34. 



Diffusion, principle of, 236. 

 Diopside, 222, 228. 

 Diplodonta orbella, figure of, 554. 

 Discohelix californicus, figure of, 

 168. 



Dividend fault, Bisbee, Arizona, 238. 

 Dosinia (?) lawsoni, 133; figure of, 

 164. 



Dosinia (Dosinella) arnoldi, 459; fig- 

 ures of, 532, 558. 



merriami, 460; figures of, 528, 534. 



var. occidentalis, 462; figure of, 

 530. 



Drillia fleenerensis, 193; figure of, 

 202. 



mercedensis, 194; figures of, 202. 



Duluth gabbro laccolith, 8; sag in, 9. 



Echinarachnius brewerianus, 390. 



Dumble, E. T., cited, 68. 



Echinoids, of Carrizo Creek Region, 

 39; of San Pablo, stratigraphic 

 range, 366; relationships, 367. 



Eldridge, G. H., cited, 70, 204, 206, 

 211. 



Eliza fault, 240. 



Elko, Nevada, 275. 



Elsmere Canon, California, 203, 205; 

 Vaqueros formation, 203; Monte- 

 rey formation, 203; Fernando 

 formation, 203. 



Elsmere Ridge, California, 207. 



Ely, Nevada, alum, 313; copper de- 

 posits, 235, 309; ore deposition, 

 26, 233; enrichment, 313; molyb- 

 denite, 313; secondary sulfids, 

 chalcocite, pyrite, 312. See also 

 Eureka Pit, Veteran Mine, Ore- 

 porphyry. 



Emmons, S.'F., cited, 240. 



Encope tenuis, 47; plates of, 52, 54. 



English, W. A., 40, 203, 243, 434. 



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