Vou. 111] ANDERSON—NEOCENE DEPOSITS OF KERN RIVER 109 
only in the Lower Miocene of the outer coast ranges, and has 
suggested that beds in which it occurs may be older than those 
of the interior valley in which T. hoffmani is replaced by T. 
ocoyana, abundant about the Kern River. . 
Thus far it remains to be shown that any such discrimination 
is warranted or possible. In other respects the Lower Mio- 
cene of the outer coast ranges does not differ faunally from 
the Temblor. Undoubtedly the Temblor group has its con- 
temporaries among some of the Neocene river-deposits of the 
Sierra Nevada, but a correlation will not be attempted here 
with these deposits. 
MONTEREY SHALES 
on 
It is quite impossible to recognize in the outcrop in any 
part of the Kern River area that member of the Miocene which 
forms its most characteristic feature in many parts of the 
Coast, that is, the Monterey Shales. 
In the series as described in the preceding pages, partly from 
the outcrop and partly from the records of deep wells, there is 
one portion that bears some resemblance to the Monterey, 
namely, that portion which is most strongly characterized 
-by shales, some of which are organic to a considerable extent. 
It will be noticed that nearly every class of materials commonly 
found in the Monterey has been found in the upper part of 
the Temblor group. Some of these points have been well 
brought out in Mr. Carmen’s description of the formations 
encountered in the Grace Well No. 5, quoted above. This 
portion of the series embraces at least 700 to 900 feet of strata, 
and includes and extends from Zone C downward to or below 
the position of Zone B, though it cannot include more than 
1160 feet. 
But if this collection of strata really represents the Mon- 
terey, it is hardly comparable in thickness or character to 
known exposures of Monterey not far away. On the western 
border of the valley, at Temblor, McKittrick, Midway, and 
Sunset, exposures of Monterey shales, almost exclusively 
organic, aggregate in thickness 4000 to 5000 feet. Moreover, 
they overlie a considerable thickness of clearly recognized 
