64 University of California Publications in Geology [Vol. 11 



also found in the Lower Oligocene of Washington and Oregon. 

 Fusinus (Ex-Ma) lincolnensis is found in the San Ramon formation, 

 which is described in this paper (p. 74) and referred to the Astoria 

 series ; the same species, together with Leda lincolnensis, is also found 

 in the type section of the San Lorenzo. 



Several papers by F. M. Anderson have contributed much to our 

 knowledge of the faunas of the Tertiary of the "West Coast, especially 

 of the Turritella ocoyana zone. The fauna of this horizon is of im- 

 portance in connection with the Oligocene problem in that until very 

 recently the fauna of the Oligocene of the Mount Diablo region was 

 correlated with it ; all of the papers in which a general list of the 

 Lower Miocene invertebrate marine species of California was given 

 included the two faunas in the same horizon. The work of the writer, 

 which will be discussed later in this paper, shows that the fauna of the 

 Turritella ocoyana zone is much later in age than that of the Agasoma 

 gravidum zone of the Mount Diablo region, and that the two zones are 

 separated by a marked hiatus. A discussion of the relative positions 

 of the two zones will be found in a later part of this paper under the 

 heading "Correlation" (p. 101). 



In the region to the east of Bakersfield, near Kern River, the 

 preservation of the fossils in the Turritella ocoyana zone is excellent. 

 In his paper entitled "A Stratigraphic Study in the Mount Diablo 

 Range of California," Anderson described a number of species from 

 this general locality. 34 It was in this paper that the name "Kreyen- 

 hagen shales" was first applied to certain shales found to the north 

 of Coalinga and which at that time were thought to be a part of the 

 Tejon (Upper Eocene). In a later publication Anderson 35 described 

 the Lower Miocene beds in the vicinity of Kern River in more detail, 

 the fauna from this section being divided into three zones, designated 

 A, B, and C respectively. This fauna, taken as a whole, is that of 

 the Turritella ocoyana zone, Pecten andersoni, Agasoma barkernianum 

 and Turritella ocoyana being some of the most common and character- 

 istic species. Anderson uses the term Temblor as the general name 

 for these beds, instead of Vaqueros as used by the United States 

 Geological Survey. 



In a recent paper by F. M. Anderson and Bruce Martin, 36 entitled 



a* Anderson, F. M., Proe. Caiif . Acad. Sci., ser. 3, Geol., vol. 2, no. 2, pp. 

 155-248, 1905. 



35 Anderson, F. M., Neocene deposits of Kern Eiver, California, and the 

 Temblor Basin, Proc. Calif. Acad. Sci., ser. 4, vol. 3, pp. 73-148, 1911. 



36 Anderson, F. M., and Martin, Bruce, Proc. Calif. Acad. Sci., ser. 4, vol. 4, 

 pp. 15-112, pis. 1-10, 1914. 



