242 



KEMP'S ORE DEPOSITS. 



2.12.07. Calico District. Deposits of 

 silver chloride in fissure veins, small frac- 

 tures and pockets in liparites and tuf aceous 

 sandstones, probably of the Pliocene series. 

 They occur in southwestern California, in 

 that portion of the State belonging rather 

 to the Great Basin than to the Pacific 

 slope. An immense outbreak of liparite 

 has formed a series of elevations, and the 

 attendant tufas are extensively developed. 



':ui. '''*'' 



rector U. S. Geol. Survey, pp. 401, 435. "On 

 the Cretaceous Rocks of Northern California," 

 Amer. Jour. Sci., iii., XL. 476. " On the Geol- 

 ogy of Northern California," Proc.Phil. Soc. of 

 Wash., Jan. 16, 1886; Abstract. Amer. Jour. 

 Sri., iii., XXXIII. 152. " Geology of the Tay- 

 lorville Region, Plumas County," BulL Geol. 

 Soc. Amer., III. 369. G. K. Gilbert, "The Re- 

 cency of Certain Volcanoes of the Western 

 United States," A. A. A. S., XXIII. 29. A. 

 Hyatt, "Jura and Trias of Taylorville, Cali- 

 fornia," Bull. Geol. Soc. Amer. , III. 395. Will- 

 iamlrelan, State Mineralogist, Ann. Rep., 1886, 

 and following, especially 1890, geology by 

 counties. J. Leconte, "Post-tertiary Ele- 

 vation of the Sierra Nevadas, shown by the 

 River Beds," Amer. Jour. Sri., iii., XXXII. 167. 

 "Old River Beds of California," Ibid., iii., 

 XIX. 190 ; iii , XXXVIII. 261. " Extinct Vol- 

 canoes about Lake Mono, and their Relations 

 to the Glacial Drift," Ibid., iii., XVIII. 35. 

 Jules Marcou, "Report on the Geology of a 

 Portion of Southern California," Wheeler's Sur- 

 vey,Ann. Rep., 1876, App., p 158. J. E. Mills, 

 " Stratigraphy and Succession of the Rocks of 

 the Sierra Nevada of California," BulL Geol. 

 Soc. Amer., III. 413. E. Reyer, Theoretische 

 Geologic, p. 537, 1888. I. C. Russell, "The 

 Quaternary History of Mono Valley, CUi- 

 fornia," Eighth Ann. Rep. Director U. S. Geol. 

 Survey, pp. 267-400. H. W. Turner, "The 

 Geology of Mount Diablo, with the Chemistry 

 of the Rocks, by W. H. Melville," G. S. A., II. 



