437 



Petroleum or rock oil 286 



Pie Counter 414 



Piracy, Alameda Creek 150 



Pit River 33, 51,404 



Piute Pass 185 



Placer gold, defined 313 



Playas or dry lakes 54, 119 



Pleistocene epoch or ice age 81 



Plutonic basement 64; rocks 93 



Point Reyes Peninsula 131 



Pony Express 20 



Primary gold, defined 313 



Quaternary period climax of moun- 

 tain building 80 



Radiolarian chert 143 



Rancho La Brea 272 



Rand Mountains 26 



Redlands 48; Heights 347 



Redrock Canyon 367 



Redwoods 1,2; Empire 409 



"Retired rivers" 54, 5 5 



Riggs Canyon fault 158 



Riggs Valley 357 



Rim-of-the-World 347 



Rivers, action of 35-39 



Riverside 48, 229, 268 



Rocky Mountains, 160; beginning of 



76 

 Roof rocks 172; over batholith 171; 



of Sierra batholith 386 

 Royal Gorge of American River 53 



Sacramento 5; River 57; Valley 399, 



401 



Salinas River 46; Valley 44, 379 

 Salt deposits 125 



Salt marshes, San Francisco Bay 383 

 Salton Sea 17, 19, 115, 339; Sink 1, 



111, 116 



San Andreas fault (rift) 22, 153, 



228, 239, 341, 350, 364, 383 

 San Bernardino 48, 347, 350; Basin 



364; Mountains 10, 23, 48, 231; 



Peak 232; Valley 50, 262 

 San Diego 10; coastal plain at 235; 



under Tertiary sea 84 

 Sandstone dikes 402 

 San Emigdio Mountains 93 

 San Fernando Pass 362; Valley 243, 



361, 371 

 San Francisco Bay 84; map of 146; 



columnar section of district 94; 



harbor 144; sediments of peninsula 



82 

 San Gabriel Range 229; River 231, 



263, 349; Valley 231, 262, 264, 



348; Wash 263 

 San Gorgonio Mountain 232; Pass 19, 



21, 22, 242, 346; discovery of 245 

 San Jacinto Mountains 238, 341, 342 

 San Jacinto Range, an uplifted block 



239 



San Joaquin River 42, 51, 52 

 San Juan Canyon 251 

 San Luis Obispo 379; Bay, sandstones 



and Jasper at 70; Creek, mouth of 



39 



San Pedro Point 148 

 Santa Ana 48; Mountains 248; River 



47, 50, 253, 265 

 Santa Barbara Islands 247 

 Santa Cruz, unconformities at 65, 66 

 Santa Fe route 8 

 Santa Monica Range 243 

 Santa Rosa Mountains 20 

 Santa Susana Mountains 371 

 Santiago Peak 251 

 San Timoteo Canyon 258, 347 

 Sawpit Canyon 47 

 Scott, W. B., quoted 59 



