464 University of California Publications in Geology [ VoL - 9 



extensive deposits of Tejon strata are found in the Santa Maria and 

 Santa Clara Valley oil districts. Tejon is reported from the Calabasas 

 Quadrangle a few miles northwest of Los Angeles. The faunal 

 stages represented here are somewhat doubtful but intensive study 

 in this field will probably show the presence of a very complete faunal 

 sequence. From a cursory examination of faunas from this region, 

 the Turbinolia and Rimella simplex zones appear to be represented. 



Tejon Eocene appears to be present on Tully's Ranch on Bitter- 

 water Creek, San Benito County, according to the work of the geolog- 

 ical staff of the Union Oil Company. This locality is only a few miles 

 north of Stone Canon and is probably a residual. 



The reconnaissance work thus far done in the Santa Lucia Range 

 in western Monterey County has not resulted in the discovery of any 

 rocks of Eocene age. Lawson reported the Carmelo series as ques- 

 tionably Eocene, but he is not inclined to this opinion now. 



The small outliers of the Tejon in the Santa Ana Mountains and 

 the gently dipping sandstones of the San Diego Eocene represent the 

 Rimella simplex zone. Such in brief is the known distribution of the 

 beds of the Tejon group in California. 



The absence of the Tejon group from the outer Coast ranges of 

 California from Cape Mendocino to the Santa Maria River in Ventura 

 County is very remarkable. Two explanations are possible: (1) the 

 Tejon was never deposited over the site of the outer ranges such as the 

 Santa Cruz Mountains and the Santa Lucia Range, but the upper 

 Eocene sediments were deposits in a great sound which opened widely 

 to the south, (2) the Tejon was deposited by a transgressing sea and 

 its sediments were removed in post-Tejon time. Lawson 84 has discussed 

 these two hypotheses for the San Francisco Bay region in connection 

 with the deposition of the Miocene as follows : 



In the Bear Creek anticline, in the northwestern part of the Concord 

 Quadrangle, the lower Monterey strata rest upon the Tejon, but here the 

 structure of the Tejon is so obscure that it is not possible to discover 

 whether or not there is structural discordance, and no conglomerate has 

 been observed at the base of the Monterey. The consideration of these 

 three sections thus affords evidence of no very profound degradation of 

 the Tejon in the pre-Monterey interval of uplift. 



In the section exposed in the Berkeley Hills, however, about five miles 

 southwest of the Bear Creek anticline, the Monterey rock rests directly 

 upon the Chico. Both Tejon and Martinez are absent. The Claremont 

 shale, the second formation of the Monterey group, lies almost in direct 



84 Lawson, A. C, The San Francisco Folio, U. S. Geol. Surv. Folio 193, 

 p. 10, 1914. 



