32 A Bibliography of the Geology, etc., of California. 



Bulletin No. 19. {Continued.) 



Part XII is a summary of the oil-yielding formations, character 

 of California petroleum, and historic sketch of oil mining. It con- 

 tains chapters on the geographical and geological range of oil-yield- 

 ing formations in California ; Neocene and more recent formations 

 in Orange and Los Angeles counties ; Geological structure pertain- 

 ing to the occurrence of petroleum ; Fuel value, etc. 



Appended are tables of fossils and an atlas of geological sketch- 

 maps. 



Report of the Board of Trustees for the four years ending 

 September, 1900. Sacramento, 1901. 15 pp. 



Bulletin No. 20. Synopsis of general report of the California 

 State Mining Bureau; by W. L. Watts. Sacramento, 

 1901. 21pp. 



A compendium of the mining industry of the State of California 

 for the four years ending December, 1899. 



LEWIS E. AUBURY, State I^Iineralogist. 



Bulletin No. 21. Showing by counties the mineral produc- 

 tions of California for the year 1900 ; by Charles G. Yale. 

 Sacramento, 1901. One large sheet. 



Bulletin No. 22. Showing the mineral productions of Cali- 

 fornia for fourteen years, 1887-1900 ; by Charles G. Yale. 

 Sacramento, 1901. One large sheet. 



Reconnoissance of the Colorado Desert mining district; by 

 Stephen Bowers. Sacramento, 1901. 19 pp. 



Bulletin No. 23. The copper resources of California; by 

 Lewis E. Aubury, State Mineralogist. Sacramento, 1902. 

 282 pp., 8 maps. Illustrated. 



The history of copper mining in California extends to an early 

 date. Old records of 1840 mention the existence of copper in Sole- 

 dad canyon, Los Angeles County, and in 1854 deposits of the mineral 

 were discovered by a Frenchman named Maris, which were subse- 

 quently worked. 



A small deposit of rich copper ore was discovered in Hope Valley, 

 Alpine County, in 1855. 



State Geologist Dr. J. B. Trask discovered copper ore in nearly 

 every county in the State during his term of office, extending from 

 1851 to 1854, but his discoveries received no attention. In fact, 

 the first practical step toward the development of the copper 



