UNIVERSITY OF CALIFORNIA PUBLICATIONS 



BULLETIN OF THE DEPARTMENT OF 



GEOLOGY 



Vol. 8, No. 13, pp. 283-288, 7 text-figs. Issued February 25, 1915 



REMAINS OF LAND MAMMALS FROM 

 MARINE TERTIARY BEDS IN THE 

 TEJON HILLS, CALIFORNIA 



BY 



JOHN C. MERRIAM 



Occurrence and Age op Vertebrate Remains 



In the fall of 1911 Mr. R. W. Pack, of the United States Geological 

 Survey, obtained a number of fragmentary mammalian remains in a 

 marine deposit situated in the Tejon Hills at the southern end of the 

 Great Valley of California. The beds in which this material was 

 obtained lie immediately to the north and west of the Tehachapi 

 Range, and are separated by a distance of between twenty-five and 

 thirty miles from the western side of the Mohave Desert, in which 

 Tertiary mammal-bearing deposits of considerable extent are known. 



In a paper read before the Pacific Coast Palaeontological Society in 

 1912 the statement 1 was made that the material obtained by Mr. Pack 

 represented mammalian types resembling an imperfectly known fauna 

 from the Mohave Desert. It was stated that the known invertebrate 

 fauna in the formation containing vertebrate remains was generally 

 presumed to represent a Lower Miocene stage. It was also noted that 

 the fauna in the Tertiary mammal beds of the Mohave region was 

 apparently not older than Upper Miocene, and that a question was 

 raised as to the correspondence of the time-scale of the California 

 marine series with that of the continental deposits east of the Sierras. 



Since the first study of the vertebrate material secured in the 

 Tejon Hills by Mr. Pack, small collections from the same localities 

 have been obtained for the University of California by R. C. Stoner 



i Merriam, J. C, and Pack, R. W., Proc. Palaeont. Soc. Bull. Geol. Soc. Amer., 

 vol. 24, p. 128, March, 1913. 



