TERTIARY DEPOSITS NEAR COALINGA OIL FIELD 23 
While a number of these forms are common to the Tejon and 
Martinez, there are several that are characteristic of the Martinez, 
and this, taken with the relation of these beds to the overlying 
Tejon, makes it necessary to refer them to the Martinez. 
The greatest surface exposure of these beds in this area is found 
in Twp. 17 S., R. 13 E., where except for a band of Cretaceous along 
the south line they form the surface rocks for the entire southern 
half of the township. The exposure of the lower shale is only a 
half to three-quarters of a mile in width and the upper shale occupies 
a similar belt, but the yellow sandstone member has an average 
breadth of exposure of nearly two miles. On the eastern line of this 
township this is narrowed to half a mile and the three members 
cross the north line of Twp. 185S., R. 14 E., with a total width of less 
than two miles. This is again narrowed toward the southeast until 
in Section 23 of this township the upper brown shale and the greater 
part of the yellow sand has been removed by pre-Tejon erosion, 
and, south of that point, so far as it occurs, the Martinez is repre- 
sented beneath the Tejon only by the basal shale with a thin band 
of yellow sand overlying it through a part of the area. 
TEJON FORMATION 
The series of sediments here assigned to the Tejon admit of 
separation into two distinct members; the lower of white sand and 
conglomerate carrying a fauna in all respects identical with that of 
the original Tejon locality, and an upper member of white shale 
which is not so fossiliferous and which, as has been suggested by 
different investigators in this area, may in part or as a whole repre- 
sent the Oligocene. 
The general section of the Salt Creek-Cantua region is as follows: 
5. White shale. 
White fissile organic shales, containing fish scales, teeth, Er. 
POAT MITE RA CECH, se. ls Me Ne soe ARS on verte sheds 08 500 
Lenses of fine brown sand. 
White shale with local thin sandy strata.............. 1,000 
bocalpnrmalblersandeye ever Cars Mim bio) oe cas Bee ue 0-30 
PiMkerOnviniverSWaler neice. Am ceil ihe cri Mei all wid je 200 
Bluish sandy shales grading up into pink shales........ 40 
AP 1,779 
