INDEX 



Preface, - ------ 



Report, ------ 9 



Physical Geography Coast Mountains, - 9 



Geology Coast Mountains, - - - - 13 



Tertiary Rocks of Coast Mountains, 15 



Primitive Kocks of Coast Mountains, - - - 17 



Volcanic Rocks of Coast Mountains, 19 



Geology San Bernardino Mountains, - 20 



Stratified Rocks of San Bernardino Mountains, 24 



Infusorial Group, Extent of San Bernardino Mountains, - 28 



Plains Los Angeles, ----- 29 



Artesian Wells, - 31 



Soils and Productions of Los Angeles, 36 



Mineral Products of Los Angeles, - 40 



Country north American River, 43 



Mineral District of Upper Sacramento Valley, - 45 



Geology Northern Coast Mountains, 46 



Local Geology of Northern Coast Mountains, - . . 48 



Carboniferous Limestone, - - - - 50 



Trinity County, - 53 



Iridum and Osmium, - - - - - 55 



Iron, - ----- 56 



Structure of Sacramento Valley, - - - - 56 



Tertiary Rocks of Sierra Nevada, - 63 



Placer Mining and Ranges, 69 



Eastern Range, - - ~ * - - 73 



Middle Placers, ------ 74 



Valley Mines, - ... - 76 



Quartz Veins, - - - - - - 81 



Quartz Mining, - 83 



Lafayette and Helvetia, Grass Valley, Nevada County, - 86 



Osborn Hill, Grass Valley, Nevada County, - 87 



Empire Mine, Grass Valley, Nevada County, 87 



Jones & Davis, Amador, Amadof County, - 87 



Keystone, Amador, Amador County, 88 



Midian, Amador, Amador Couny, - 88 



Eureka, Sutter, Amador County, - 89 



Statistics of Mines, - 89 



Water Companies, ----- - 90 



New and Resumed Mines for 1854, - - 91 



Barometric Altitudes, - - - - - $2 



