INDEX. 559 
Gold, character and size of, in Niagara Consolidated Co.’s | Gopher Hill, near Sailor Flat, 413. 
Mine, 451. Gopher Hill, at Spanish Ranch, 472. 
at Paragon Mine, 114. Gopher Hills, near Copperopolis, bed-rock at, 121, 
at Pittsburgh Hill, 430. Gore Tunnel, at Forest Hill, 111. 
in Polar Star Mine, 424. Goshen Hill, 183. 
at Quaker Hill, 425. Grade of channel, at Bald Mountain, 437. 
at Quigley Ravine, 475. steepness of at Dutch Flat, 418. 
at Relief Hill, 405. ; small, between Dutch Flat and Indiana 
at Ruby Tunnel, 438. Hill, 418. 
at Sailor Flat, 413. between Hepsidam and Gibsonyille, 452. 
on Slate Creek, 451. near La Porte, 446. 
at Smith’s Point, 114. on North San Juan Divide, 386, 401. 
at Specimen Claim, 114. between Malakoff and Badger Hill, 392. 
at Sterrett’s Claim, 114. beween Omega and Relief Hill, 408. 
in Tuolumne Table Mountain, near Smartsville, 380. 
136. near Woolsey Flat, 400. 
in Van Emmons’s Claim, 114. Grades, relation of, in Pliocene and present rivers, 344. 
in Weske’s Claim, 114. Granite, boulders of, at Bath, 497. 
at Wiessler’s Claim, 113. of Coast Ranges, 20. 
fineness of, at Badger Hill, 473. connected with metamorphism, 353. 
at Bald Mountain, 437. ; dome-structure of, 33. 
at Brandy City, 462. at Eureka, 407. 
in Camptonville District, 432. of Fresno County, character of, 43. 
on Cafion Creek, 459. not the metalliferous rock of the Sierra Nevada, 353. 
in Cariboo Diggings, 158. partly metamorphic, 506. 
at Cedar Claim, Gold Run, 149. of Sierra Nevada, 31, 33, 506. 
at Cherokee Flat, 483. surface of at American Hill, 387. 
§ between French Corral and N. S. Juan, | Granite Hill, near Placerville, 111. 
389. Gravel, at high altitudes, on Fall Creek and Grouse Ridge, 408. 
at Manzanita Hill, 389. association with volcanic, 308. 
at Monte Cristo and vicinity, 466. formed from bed-rock, richer in gold than the present, 
at Morristown, 459. 351. 
on Mumford Hill, 477. - blue, its mode of occurrence, 509. 
at Niagara Consolidated Co., 451. chemical action in, since deposition, 519. 
from Red Ledge, near French Corral, 390. has been chemically acted on from below, 330. 
near Smartsville, 193. of Coast Ranges, 22, 23. 
fine richer than coarse, 114. not auriferous, 54, 300. 
forms of, discussed, 360. color of, resembling that of underlying bed-rock, 520. 
forms of in quartz, 357. disturbances of, in recent times, 348, 447, 457, 473, 
last formed of the metals, according to Murchison, 356. 474. 
irregularity of its distribution in the gravel, 351. protected from erosion by volcanic capping, 309. 
loss of, in washing, estimated, 198. how far up the Sierra they extend, 526. 
in quartz, mostly invisible, 357. geological age of, discussed, 314-321. 
source of, and distribution in gravel, 350-361. not the work of glaciers, 508. 
on surface, at Pittsburgh Hill, 431. ; lithological character and peculiarities of, 321-333. 
widespread occurrence of, how accounted for, 361. not of marine origin, 73, 508. 
why collected on bed-rock, 516. methods of washing it for gold, 58, 59. 
yield of. See, yield of gravel. mode of its accumulation, 512. 
Gold Hill, Placer County, implements in gravel, localities of, of northern counties, 55. 
277. peculiarities of, at Gregory’s Claim, 483. 
Golden Gate Caton, 108. ; quartz vein in, 330. 
Gold Run, 146-148, 152. red and blue, between French Corral and North San 
Gold Run Ditch and Mining Company, 161, 421. Juan, 387. 
Gold Run, Dutch Flat, and You Bet districts, changes in silicification of, 327. 
smce 1870, 416. thickness of, on North San Juan Divide, 202, 388. 
Gold Springs, near Columbia, implements in gravel from, inferences from, as to character of streams 
262. at time of its formation, 343. 
Gold Springs Gulch, implements in gravel from, 263. uncovered, on North San Juan Divide, 199. 
Goodyear, W. A., field of his explorations, 79-83. uniformity of, at Indiana Hill, 421. 
