4* 



564 



INDEX. 



Pliocene channels, compared with present, 64. 



Pliocene and Recent, difficulty of drawing line between, 283. 



Pliocene rivers, areas drained by, 342. 



Plug Ugly Hill, 153, 417, 419. 



altitudes taken near, in 1870 and 1879, com- 

 pared, 417. 

 Plumas County, fosn'ls from, 36. 



official map of, 444. 



and adjacent parts of Sierra County, topo- 

 graphy of, 444. 



Poker Flat, serpentine at, 459, 



Pokerville, locality of implements in gravel, 275. 



Polar Star Mine, near Dutch Plat, 417, 421. 

 Pond's Claim, near Todd's Valley, 118. 

 Fontiac Hill, near Nevada City, 188. 

 Porphyritic green slate, a diabase tufa, 44. 



Portwine, 455. 



Position, elevated, of gravels discussed, 344. 



Post's Claim, in Wilson's Ravine, 469. 



Potato Ravin;;, 149. 



Pot-holes in bed-rock, at Manzanita Hill, 387- 



Potosi Mine, 89. 

 Poverty Hill, 454. 



Powder, great quantity used at one blast rt Smartsville, 193. 



use of, in hydraulic mining, 373. 



at Manzanita Hill, 389. 



at Malakoff Mine, 396. 

 Powningville, 85. 



Pratt's Hill, near lone City. 127- 



Precipitation, increased, in gravel region, the essential cause 



of difference between past and present epochs, 335. 

 Present epoch, in gravel region, how separated from past, 



241. 

 Present canons, position of, not due to orographic causes, 



348. 

 Princeton, locality of implements in gravel, 262. 



Prior Ravine, near Quaker Hill, 179. 



Primordial stock, no trace of mini's, 287- 



Proboscida;, range of, in North America, 251. 



remains of, in gravels, 251-256. 



Progress of prehistoric man in America towards civilization 



small, 287. 

 Propylite, nature of, 350. 



Prospect Flat, locality of infusorial silica, 225. 



Q Ranch, near lone City, 127. 



Quail Hill, 122, 352. 



Quaker Hill and vicinity, 177-181, 423-425. 



Quaker Hill and Indiana Hill, table of altitudes between, 420. 



Quartz, large boulder of, in Cariboo Ravine, 159. 



large masses of gold in, 359. 

 Quartz boulders, in channel at Damascus, 493. 



at Moore's Flat, 403. 

 Quartz crystals, in fossil wood, 237. 

 Quartz -diorite, from bed-rock, near French Corral, 386. 

 Quartz mining and gravel regions, essentially the same, 350. 

 Quartz gravel, on Dutch Flat Hill, 422. 



discussion of, 323. 

 Quartz vein, in gravel, 330. 



Quart vein, the Great, 45, 331. 



Quartz veins, their association with auriferous gravel de- 

 posits, 56, 57. 



near Chips's Flat, 435. 



epoch of their formation, 330, 353. 



forms of gold in, 358. 



near French Corral, 390. 



general distribution of, in bed-rock, 351. 



of Mariposa County, 302. 



mineralogical character of, 56. 



persistency of, 355. 



Quicksilver, geological formations in which it occurs, 21. 



Quincy and vicinity, 2.15, 470-478. 



Quincy and Sierravillc, region between, 478, 479. 



Quien Sabe Ravine, 474. 



Quigley Ravine, 475. 



Rafael (San) Mountains, geology of, 19. 

 Ram, the quantify of, as connected with erosion, 338. 

 Rain and rivers, the cause of bed-rock erosion, 337- 

 Rain-fall in Great Valley, 13. 



in Pilarcitos Valley, 13. 



in Sierra Nevada, 14. 



at Visalia, 14. 

 Railroad Claim, near Quaker Hill, 179, 180. 

 Railroad Flat, 126. 



Railroad Hill, near Camptonville, 428. 

 Randall's Claim, near Aqueduct City, locality of mortars in 



gravel, 275. 

 Range, vertical, of fossil plants, 235. 

 Rattlesnake Mine, near Deadwood, 92, 110. 

 Recent drainage sytem of Sierra Nevada, its peculiarities 



discussed, 345. 

 Red Dog and Quaker Hill, channel between, 419. 

 Reed Claim, near Deadwood, 92, 105, 109, 110. 



locality of fossil wood, 238. 



Reed Claim, Mameluke Hill, 96. 



Red gravel, its relation to the blue, discussed, 325, 326. 



Red Point, near Damascus, 92. 



Reducing agencies, propagated from below, 332. 



Refuge Cafton, near Wisconsin Hill, 83, 91. 



Relief Hill, 201, 404. 



Remington Hill, 175. 



Remond, A., his explorations in Tuolumne County, 81. 



Report on gravel, a. perfect one not possible, 289. 



Resume of gravel phenomena, 289-376. 



Review of geological character of the Coast Ranges, 18-24. 

 Rhinoceros occidentals, from Chili Gulch, 243. 



from Douglass Flat, 243. 



analysis of bone of, 244. 

 Ribciro, his evidence as to Tertiary man in Portugal, 282. 

 Richthofen, F. v., his views in regard to ancient channels con- 

 troverted, 316. 

 Riffles, used in gold washing, 59. 



Rim-rock, defined, 76. 



at French Corral, 387. 

 gravel often richest on, 518. 



River mining, 60, 335. 



Rivers, draining western slope of Sierra Nevada, 10, 11.. 



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