Vor. 111] ANDERSON—NEOCENE DEPOSITS OF KERN RIVER 107 
places in the Mt. Diablo Range and in the Temblor basin in 
general. 
It was at first thought that this horizon might prove to be 
older than the typical Temblor, on account of the number of 
large pecten species it contained, but there is now quite abund- 
ant proof that a horizon older than the Temblor has not been 
recognized either here or in any part of Temblor basin, nor 
do the stratigraphic facts from any part of the basin furnish 
proof that older Neocene beds exist within it. It may be 
supposed that the occupation of the Temblor basin by the 
sea was transgressional and progressive, and that there are 
older beds belonging to the Neocene in the outer coast ranges; 
but if this is true, it has yet to be shown. 
The relationship of Zone B both faunally and stratigraphic- 
ally is clearly with the Miocene, and its correct reference to 
this period will hardly be questioned, notwithstanding the 
recent or modern aspect of some of the species, as already 
mentioned. 
Not only is it to be regarded as Miocene, but the preponder- 
ance of evidence is undoubtedly in favor of its connection 
with the Lower Miocene. Any question which may arise as 
to its exact stratigraphic position is more likely to involve 
only a choice between the Temblor and the Monterey. But 
thus far in the study of the West Coast Miocene, the Mon- 
terey has not been regarded as the habitat of such species as 
Agasoma gravidum, Turritella ocoyana, Cytherea mathewsont, 
Dosima whitney, Y oldia impressa, and a score of other species 
given in the lists. Indeed, Dr. Merriam has cited all of the 
above-named species except the last as being characteristic of 
the beds below the Monterey shales. And none of the species 
of Zone B are characteristic of any Miocene horizon younger 
than the Monterey. And furthermore it must be added that 
while Zone B is rich in species some of which have often been 
found in the Monterey shales, the species most widely charac- 
teristic of the latter, namely, Pecten peckhami, has not been 
found at all in any part of the Kern River area. 
In the same manner it may be shown that Zone C, both 
stratigraphically and faunally is related to the Temblor, rather 
than to any later division of the Neocene. All of its species 
are found in both Zones A and B, and while some of them 
