34 ET DOMBLE 
4. White sandstone and conglomerate. 
Yellowish to white; usually fine sands Saher 100-160 
White massive sandstone and conglomerate with whitish 
shaletinclustonsiat, te DaSey sy siiny ee uaa tenan ene 20-40 
200 
In this portion of the field the base of the Tejon is a fossiliferous 
conglomerate and sandstone which shows distinct unconformity 
with the underlying Martinez. Thus, on the east line of Section 17, 
Twp. 195S., R. 15 E., the base of the conglomerate is upon an oxidized 
zone and the massive sandy shale immediately below the conglom- 
erate is cut by numerous burrows that appear to have been made 
by crustaceans, in some cases extending down to a depth of three 
feet.. These burrow holes have been filled with ferruginous sand 
and gravel conglomerates that are connected directly with the 
overlying conglomerate. To the northwest in- Twp. 175., R. 13 E., 
where the conglomerate rests upon the upper shale of the Martinez, 
it contains shale inclusions at the base. 
Here, as elsewhere, the Tejon carries coal locally. These coal 
seams occur near the base and as thin stringers higher in the section, 
but in this area they have not proven to be of economic value. It 
is interesting to note that the coal north of the Cantua occurs 
above the conglomerate, which we here make the base of the Tejon, 
while west of Coalinga it occurs below a similar conglomerate. At 
the Oil Canyon locality, described under the Martinez, the Tejon 
beds are coal bearing only in their upper portion, that is, from 250 
to 300 feet below the top, while below the coal-bearing beds there 
is probably a thickness of 600 feet of shale before the heavy con- 
glomerate, which there marks the base of the formation, is reached. 
For this reason, it would seem that either this member of the Tejon 
has much decreased in thickness or that only the upper portion of 
the beds as seen at Oil Canyon are represented there. 
While the exposures of the upper white shale are excellent 
through Coalinga—Salt Creek—Cantua area, the few fossils obtained 
during this examination do not give any more definite grounds for 
determining its age than those before known. It apparently suc- 
ceeds the lower member of the Tejon without unconformity and is 
highly unconformable with the succeeding Vaqueros beds of Lower 
Miocene age. 
