

556 



INDEX. 









Clay bank, near La Porte, 448. 



Clermont Peak, 215, 216, 476. 



Cleveland Mine, at Scales's Diggings, 454. 



Clinton Claim, Grizzly Canon, 117. 



Cloud-bursts, 15. 



Clydesdale Claim, locality of white lava, 225. 



Coal Canon, near Cherokee Flat, 485. 



Coast Ranges, geological age and structure of, 15-26. 



formed, in part, from debris of Sierra Nevada, 



346. 

 in contact with Sierra in Northern California, 



315. 



gravels in, 299, 300. 



rain-fall in, 13. 



resume of geology of, 25, 26. 



rocks of, 17. 

 topography of, 4. 



uplift of, its character, 17. 



Coherence of sandstones, cause of, 326. 



Cold Cahon, 458. 



Cold Spring Mountain, 144. 



Colfax, volcanic rocks at, 103. 



locality of fossils, 37- 



Coloma, human femur in cement at, 277. 



Columbia, Tuolumne County, mining on limestone, 124, 139. 



implements in gravel at, 263. 



locality of vertebrate fossils, 256, 257. 



Columbia Mine, Placer County, 107. 



Columbia Hill, Nevada County, ditches centering at, 197. 



width of channel at, 343. 



mining at, 395. 



and Lake City, channel and gravel between, 



394. 



Columbia River, theory of its connection with the " Blue 



Lead," discussed, 511. 



Compression, longitudinal, of slates, in Sierra, 49. 



Comstock Lode, its geological position, 354. 



Conditions required for successful hydraulic mining, 298. 



Confidence Mine, Cedar Ravine, 99. 



Conglomerate, volcanic, how accumulated, 525. 



Congregationalist (newspaper) informed by a clergyman that 



the Calaveras skull is a hoax, 270. 

 Coniferous trees, none during gravel epoch, 234. 



their present predominance in the Sierra, 233. 

 Conness, John, first light on geological age of auriferous 



slates from him, 35. 



Connor Hill, near Nevada City, 190. 

 Coon Hollow, near Placerville, 108, 119. 

 Copper, native, in gold washings, 366. 



tools of, their use in this country not implying a 

 great advance in civilization, 287. 

 Copperopolis, bed-rock near, 122. 

 Cordilleras, metallic wealth of, 355. 

 Cosumnes Copper Mine, bed-rock at, 86. 

 Council Hill, 453, 454. 



Council Hill, to Howland Plat, region examined, 452-458. 

 Council Hill, channel traced from that point to Potosi, and 



lost, 458. 

 Course of events during gravel period, 515. 



Coyote Diggings, Nevada County, 189. 

 Cozzen's & Garber's Mine, 167. 

 Craig's Flat, mines at, 459. 

 Crane's Gulch, bed-rock at, 85. 



seam diggings at, 116. 

 Craycroft's Hill, 465. 

 Crescent Tunnel, 439. 

 Cretaceous rocks, in Coast Ranges, 21-23. 



on flanks of Sierra, 315. 

 wanting in gravel series, 317. 

 Crevices, in bed-rock, 90. 

 Cruz (Sta.) Range, geology of, 21. 

 Crystallized gold, occurrence of, 358. 



Dahneke's, D. H., Tunnel, 432. 



Dam Claim, El Dorado Canon, 93, 112, 117, 493. 



Spanish Dry Diggings, 115. 

 Dam, the Rudyard, 198. 

 Dams, artificial, formed by tailings, 425. 

 Damascus Canon, 91, 491, 493. 

 Dardanelles Claim, 84, 90, 95. 

 Davis Point, 467, 468. 

 Deadhead Claim, near Newtown, 101. 

 Deadwood, near El Dorado Canon, 103, 112, 492. 



on Ridge between Canon and Little Canon Creeks, 

 459, 460. 

 Deadwood Channel, near Elizabethtown, 472. 

 Dean's Tunnel, near Nevada City, 184. 

 Decomposition of bed-rock under gravel, 434. 

 Deep Canon to Last Chance, 103. 

 Deer Creek, lava-flows down, in vicinity of, 181. 

 Democrat Ravine, near Remington Hill, 177. 

 Densmore's Claim, near Startown, 97, 108. 

 Denudation in Sierra Nevada, since close of volcanic epoch, 



522. 

 Depot Hill, near Camptonville, 428. 

 Depressions and furrowings, in bed-rock, 517. 

 Depths to whieh gold mines are worked, 355. 

 Derbcc shaft, 399. 



Des Chutes Basin, Oregon, locality of infusorial silica, 227. 

 Detrital materials, mode of occurrence of, in river channels, 



345. 

 Devil's Basin, 93, 105, 492. 

 Diamonds, at Cherokee Flat, 483. 



occurrence of, in gravels, 362-364. 



microscopic, from California and Oregon, 364. 



origin of, in gravel, 520. 

 Diamond Creek, 411. 

 Dick Claim, El Dorado Canon, 109, 117- 

 DiekerhofFs Mine, near Placerville, 99, 111. 

 Difference between Tertiary and Recent Epoch, the essential, 



335. 

 Dikes, volcanic, connected with metalliferous deposits, 310. 

 Dip of slates in Sierra Nevada, 50. 

 Dirty Flat, direction of channel at, 111. 



occurrence of diamonds at, 363. 

 Distribution of gold in the gravels, 361. 



the gravels, generally considered, 298-314. 

 Disturbances in gravel since its deposition, at Bean Hill, 474. 





