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University of California Publications in Geology L VoL - 7 



scribed, and extensive fossil lists given. These terrigenous beds 

 are the same as those called "Temblor" by F. M. Anderson. 

 The Temblor is considered the equivalent of the Vaqueros of the 

 coast because of "the large number of species common to the 

 two" (p. 87). 



The "Monterey shale" is considered to be probably absent, 

 although it is stated that the "Big Blue" referred to the Mon- 

 terey by F. M. Anderson "corresponds in stratigraphic position 

 to the Monterey shale (middle Miocene) of regions near the 

 coast, but nothing has been discovered to indicate that it may 

 belong to that formation" (p. 76). 



Cantua-Panoehc District, B. Anderson, 1910. — A brief state- 

 ment of the geology to the north of the Coalinga district, in the 

 Cantua-Panoche region, was given by Robert Anderson in Con- 

 tributions to Economic Geology. 1909. 11S Under the caption 

 "Lower Miocene" (pp. .64 et seq.) is described "the continu- 

 ation of that described as the Vaqueros sandstone (lower Mio- 

 cene) in the report of the Coalinga district." The fauna in 

 the hills surrounding the Vallecitos (30-35 miles north of Coal- 

 inga) is said to differ in aspect "from that in the Coalinga dis- 

 trict or from any other well known fauna of the Coast Ranges. 

 This fauna, together with the presence in the formation ... of 

 considerable masses of siliceous diatomaceous shale, which occurs 

 only in thin zones in the northern part of the Coalinga district 

 and is absent in the southern part, suggests a possible equivalence 

 of the formation to the lower portion of the Monterey shale in 

 the region nearer the coast and a gradual transition westward 

 from the sandy and gravelly strata at the eastern edge of the 

 Coast Range to the purely organic sediments in the coastal belt." 

 The fauna is said to be characterized by such forms as Turritella 

 ocoyana, Pecten anclersoni, P. propatnlus, and teeth of Desmo- 

 stylus, which would seem to place it in the T. ocoyana zone or F. 

 M. Anderson's Temblor. Robert Anderson remarks that "Any 

 correlation of sandy fossiliferous strata with the Monterey shale 

 is difficult to make, owing to the scant knowledge of the fauna 

 of Monterey time. Hence the suggestion of the possible equiv- 

 alence of the formation to the lower part of the Monterey shale 



fi» U. S. Geol. Survey, Bull. 431-A, pp. 54-83, 1910. 



