COAST RANGES OF THE PACIFIC AND THE SAN ANDREAS FAULT SYSTEM 



463 



J 



Pacific 

 Ocean 



Tv 



Nacimiento 

 Fault . 4- 



La Panza 

 Range 



5on Andreas 

 Fault rTm 



J* 



hettelmon 



Hills 



J-f 



^T 



,/\ / \ / \ 'X I S I s I I l\ IS /Jt> 



i / \ / \7 v? » "i\i \ [w \ / \ / \ / \ 



'/ / \ / \ / \ / \ / \ / \ / \ /_\ /J, / \ / \ / \ / \ / \ /_\ /_\ /_\ /S /\ g /_\ / \ / \ / \ /\ / \ '_\ /_\ /_\ / \ / \ / \ / , / > „ 



*/ w w w w w \ / w w w \ i w \7 w \~/~/s/\/\/ \7 %"/ \ / \~ w s7 w <7 w ~i w w w s7 \7 \7 s"7 \ 



5an Andreas 

 Fault 



Temblor 

 Range 



V 



5a n Joaquin 

 Valley 



Los Angeles Basin 



Tp 



Tm 



Jan Gabriel 

 River 



5a n Andreas N 

 Te-» Fault 



77s 7 \ /\ / \ / \ / \ / \ / \ / \ / \ /\ ^__\ ' \~*£ 



. "T^y \ i\i\i\ is i\ i\\\i\ i\i\i\i\i\i~i ~a i \i\ i\i\isi\i \i\i 



y'JJjji^isS' \7 \7 w \7 w \7 ,"/ \~> \" waV \7 \7 \7 w \ / \7 C/w www s~i\ / j /_\ /_\ /\ /> /_\ / 

 j/V/w x_/ N "' w w w w v"7 \7 <"/ \"7 w \~ OOw\7\/\7\/w\/w\/\"/\/\#w\/\#\/\/ 



10 



20 



MILES 



Fig. 29.10. Generalized cross sections of the Coast Ranges of southern California, after Reed and 

 Hollister, 1936. Be, granite and metamorphic rock basement; Jf, Franciscan; Ksc, Cretaceous strata; 



Te, Eocene strata; To, Oligocene strata; Tm, Miocene strata; Tp, Pliocene strata; Tv, volcanics. 

 Sections J-J', L-L', M-M\ and N-N' of Fig. 29.1. 



conglomerate, lower Sespe continental red sandstone, Coldwater and 

 iTejon marine sandstone and sandy shale, and the Kreyenhagen siliceous 

 I shale. 



Oligocene and early Miocene (Fig. 29.6) time saw a great increase in 



size of the land areas, considerable parts of which received thick deposits 

 ; of red and green shales, the nonmarine part of the Sespe formation. Later 

 ion in Vaqueros time, the sea invaded much of the Sespe lowland. In the 

 jSan Joaquin embayment, the Kreyenhagen shale was deposited, and it 



graded into sandstone southward. Still farther southwest, in the Santa 

 Barbara embayment, the Sespe red beds accumulated. Reed (1933) be- 

 lieves a basin had become semi-inclosed and was gradually filled with 

 silts and oozes of high organic content that later evolved the oil in the 

 Coalinga district. 



Although the land areas increased in size and the seaways decreased, 

 the Santa Barbara trough continued strongly negative, and Miocene and 

 Pliocene sediments accumulated 25,000 to 30,000 feet thick in the deepest 



