9.^>. 



TERTIARY AND QUATERNARY PECTENS OF CALIFORNIA. 



List of fossils from the Carrizo Creek beds (Miocene). 



ANTHOZOA. 



Diploria bowersi Vaughan (Mss. ). 

 Favia merriami Vaughan. 

 Plesiastrea californifa Vaughan (Mss.). 

 Sideraatrea californica Vaughan (Mss.). 

 Stephanocoenia fair))anksi ^'aughan. 

 Stephanocoenia fairbank.si var. columnaris 

 Vaughan. 



ECHINOIDEA. 



Clypeaster bowergi Merriain. 



PELECYPODA. 



Anomia subcostata Conrail. 



Area n. sp. (?) A. 



Cardium (Traehycardium) n. sp. (aff. ) quadrige- 



narium Conrad. 

 Dosinia sp., perhaps new. 

 Gastrochsena sp. 

 Lithophaga sp. 



PELECYPODA — Continued. 



Ostrea vespertina Conrad. 



Pecten carrizoensis n. sp. 



Pecten cerrosensia var. niendenhaUi n. var. 



Pecten deserti Conrad. 



Pecten (Hinnites) giganteus Gray. 



Pecten keepi n. sp. 



Phacoides ( of. ) acutilineatus Conrad. 



Pholas (aff.) crucigera Sowerby. 



GASTEROPODA. 



Cyprsea sp. indet., large and probably new. 

 Malea ( +Dolium ) near ringens Sowerby. 

 Oliva (?) sp. indet. 



Polynices (Neverita) recluziana Deshayes. 

 Stronibus n. sp. (aff. ) granulatus Sowerby. 

 Strombus (?) n. sp. B. 

 Tivela (cf. ) ineziana Conrad. 

 Turritella ( cf. ) hoffmanni Gabb. 



SAN PABLO FORMATIOX. 

 TYPE LOCALITY. 



The type locality i.s .south side of San Pablo Bay, near Union oil refinery. 

 Contra Costa County, Cal. 



NAME AND DESCRIPTION. 



The formation was named and described by Dr. J. C. Merriain, in Bulletin 

 of the Department of Geology, University of California, vol. 2, No. 4, 1898, p. 

 113 et seq. 



DEFINITION. 



The formation at the type locality consists of a series of sandstones, tuffs, 

 and ashes with an approximate total thickness of between 1,500 and 2,000 feet. 

 At this localit_y it rests apparently conformably upon the Contra Costa County 

 Miocene. In the Salinas Valley, and at many other places, formations which 

 are probably the equivalents of the San Pablo rest unconformably upon the 

 Monterey shale. In the Santa Cruz quadrangle, beds containing the supposedly 

 characteristic San Pablo echinoderm, Astrodapsis tumidm Remond, rest uncon-. 

 formably upon the Monterey, and are overlain conformably by at least a part 

 of the Purisima (lower Pliocene). 



LOCALITIES. 



San Pablo Bay, Walnut Creek, and Kirkers Pass, Contra Costa County. 



Scott Valley, Santa Cruz County. 



San Ardo and other localities in the Salinas and adjacent valleys, Monterey County. 



Coalinga and vicinity, Fresno County. 



Estrella Valley, Santa Margarita and vicinity, 3 miles east of La Panza, Caniniatta ranch. Music P. 0., 



and Pismo and vicinity, San Luis Obispo County. 

 Santa Catalina Island, Los Angeles County. 



