558 
Fir cap, 465. 
Fissure veins, likely to disappear at very great depths, 352. 
Flora’s, near Volcanoville, 84, 96, 108, 113, 119. 
faults in bed-rock at, 348. 
Fluorine, large amount of, in hippopotamus tooth, 245. 
Fluviatile origin of gravels positively determined, 293. 
Folsom, Cretaceous rocks at, 51. 
Forest City Divide, 426-440. 
Forest City and vicinity, 433-440, 
drift mines at, 436. 
channel at, 213. 
Forest, fossil, near Calistoga, 327. 
at Chalk Bluffs, 237. 
Forest Hill and vicinity, bed-rock at, 89. 
channels discussed, 106, 494, 497. 
implements in gravel at, 277. 
yield of gravel at, 118. 
Forest Home, 102. 
implements in gravel at, 275. 
Foot-hills of Sierra Nevada, geology of, 51. 
Forney’s, on Pilot Creek, 104. 
Fossil, the Calaveras skull shown to be a, 271. 
Fossil plants, tabular statement of their occurrence in the 
gravels, 235. 
Fossil remains, difficulty of finding, in perfect condition in 
the gravels, 259. 
Fossil wood, analysis of, 236. 
at Bear Hill, 239. 
at Calistoga, 237. 
at Chalk Bluffs, 237, 327. 
at Kentucky Flat, 239. 
at Minnesota, 435. 
at Negro Hill, 238. 
mode of occurrence of, 236, 237, 327. 
at Secret Diggings, 447. 
under Tuolumne Table Mountain, 136. 
Fossils, evidence of, as bearing on age of gravels, 319. 
of the gravel series, described, 219-288. 
indicative of former warmer climate, 337. 
Francisco (San) Bay, geology of region adjacent to, 21, 22. 
Francisco (San) Cation, Pliocene gravels in, 19. 
Francisco (San) Pass, geology of, 19. 
Franklin Claim, near Greenwood, seam diggings at, 115. 
Franklin Claim, near Placerville, 90, 104, 118. 
Frank’s Tunnel, near Remington Hill, 176. 
French Corral, diamonds from, 364. 
gravels at, 200. 
gravel at high altitudes near, 385. 
French Corral and North San Juan, examination of district 
between, 385-390. 
French Corral and Smartsville, examination of district 
between, 383, 384. 
French Lake Reservoir, 198. 
Fresno County, gravels of, 141. 
Furrows in bed-rock, 517. 
Gabb, W. M., on Jurassic and Liassic fossils, 41. 
Galena Hill, 428. 
Gardner’s Point, above Portwine, 455, 456. 
INDEX. 
Garnet, in gold washings, 366. 
Gavilan Range, geology of, 20. 
Gas Cafion, 181. 
Gems, in gold washings, 366, 367. 
Genesee Valley, locality of Triassic fossils, 39. 
Geological record, imperfect, for time when land raised above 
the sea, 318. 
Geological Survey of California, its work in the gravel region, 
78. 
Geological Surveys, work of, must be continuous and never- 
ending, 290. 
Georgetown, course of channels near, discussed, 498, 499. 
Georgia Hill, near Yankee Jim’s, 95, 115. 
Georgia Slide, bed-rock at, 84. 
seam diggings at, 115. 
Germania Claim, at Craycroft’s, 466. 
Gibbs, W., M.D., examination of nickel, 366. 
Gibsonville, list of claims near, 450. 
Gibsonville and La Porte, region between, examined, 445- 
452. 
Glacial action, indications of, near Sierra City, 441. 
Glacial epoch, in Sierra Nevada, where discussed, 336. 
Glacial markings, near Bowman’s, 408. 
near Jamison City, 479. 
Go-ahead Shaft, above La Porte, 450. 
Golconda Ravine, 403. 
Gold, association of, with slaty rocks, 301. 
Gold, character and size of, at Alpha, 409. 
at Arnott & Co.’s Mine, 462. 
at Badger Hill, 473. 
in Bald Mountain Mine, 437. 
in Boston Mine, 402. 
at Castle Hill, 114. 
at Cedar Claim, Gold Run, 149. 
in Cement Mil] Claim, 114. 
at Cherokee Flat, 482. 
at Depot Hill, 429. 
near Dutch Flat, 151. 
from El Dorado Hill, 114. 
in Excelsior Claim, 114. 
at Gopher Hill, 413. 
in Grizzly Cafion, near Campton- 
ville, 431. 
in Grizzly Cafion, near Wisconsin 
Hill, 113. 
in Indian Cafion, 1138. 
at Indian Hill, 430. 
at Indiana Hill, and vicinity, 424, 
425. 
at Lebanon Tunnel, 113. 
in Mad Cafion, 114. 
at Malakoff, 397. 
at Manzanita Hill, 389. 
at Michigan Bar, 102. 
at Monte Cristo, 465. ; 
in Mountain Gate Tunnel, 114. 
at Mugginsville, 463. 
at Nahor’s Claim, 113. 
at New Jersey Mine, 114. 
