1916] 



Merriam: 



Mammalian Remains from the Tejon Hills 



115 



Note on the Marine Tertiary Faunas op the Tejon Hills Section, Furnished 



by B. L. Clark 



Marine deposits of the two stages of the Miocene are represented 

 in the Tejon Hills. A number of characteristic species of that phase 

 of the Miocene generally known as the Monterey of the local phase 

 designated as Vaqueros or Temblor are represented in gray and 

 brown sandstone, having a thickness of about 300 feet. These beds 

 rest unconformably upon the granite and have a dip of from 10 de- 

 grees to 15 degrees. Certain of the species found in this formation 

 are generally considered characteristic fossils of the Monterey group. 

 Among these forms may be listed the following : 



Seutella andersoni Twitehell 

 Seutella merriami Anderson 

 Peeten andersoni Arnold 

 Leda ochsneri Anderson and Martin 

 Oliva californiea Anderson 



Troplion kernensis Anderson 

 Conus oweniana Anderson 

 Terebra eooperi Anderson 

 Turritella oeoyana Conrad 



Disconformably overlying the Vacpieros or Temblor of the Tejon 

 Hills is the Santa Margarita Upper Miocene. The beds of this forma- 

 tion are best exposed near the mouth of Comanche Creek. Here they 

 have a thickness of between 50 and 100 feet. They are generally com- 

 posed of light-colored arkose sandstones with which occur lenses of 

 clay and gravel. The fauna found in these beds apparently belongs 

 to the Astrodapsis whitneyi zone as recognized in the San Pablo group 

 of the Mount Diablo region, and to the same horizon as the Santa 

 Margarita beds to the north of Coalinga. The following species were 

 collected from the Santa Margarita of the Tejon Hills on the west 

 side of Comanche Creek near the western boundary of the NW 14, 

 sec. 13, T 32 S, R 29 E, M. D. B. and M. 



Dosinia arnoldi Clark 

 Metis alta (Conrad) 

 Ostrea titan Conrad 

 Ostrea, ef. vespertina Conrad 

 Peeten crassicardo Conrad 

 Peeten crassicardo, n. var. 

 Peeten hastatus Sowerby 

 Peeten raymondi Clark 

 Phaeoides riehthof'eni (Gabb) 

 Phacoides sanetaecrucis Arnold 

 Pinna alamedensis Yates 



Piteria stalderi Clark 



Saxidomus nuttali Conrad 



Siliqua, cf. lucida (Conrad) 



Venus pertenuis Gabb 



Bulla, sp. 



Oalyptraea, sp. 



Conus, sp. 



Fusinus, n. sp. 



Nassa pabloensis Clark 



Natica, sp. 



Shark teeth 



