Age of the California Coast Jianc/es. — Fairbanks. 279 
Eocene. The Tejon beds have generally been considered as 
conformable upon the Chico. In Oregon Mr. Diller* has 
shown that a break exists, the underlying Shasta-Chico series 
being much more disturbed. There are evidences however 
througii the central Coast ranges of a stratigraphic break, for 
while the Tejon occurs only sparingly the Chico is widely dis- 
tributed. Should a break be demonstrated it is indicative of 
an upward movement of the region, leaving much more of 
the land above water during the Tejon than the Chico. 
The northernmost known occurrence of the Tejon in the 
Coast ranges is about Clear lake. From Mt. Diablo south- 
ward it is well developed on the eastern flank of the Coast 
ranges and at several points near the coast-line. It is devel- 
oped in greatest extent in northern Ventura and eastern San- 
ta Barbara counties. On Carmello bay there are bodies of 
sandstone and conglomerate, the latter consisting partly of 
pebbles of the granite on which it rests. It is referred pro- 
visionally by Lawsonf to the Tejon. A similar sandstone has 
been observed south of Point San Pedro by the same geolo- 
gist.;*; The great development of the Tejon at the southern 
end of the Coast ranges gives plausibility to the idea that the 
Great Valley had connection with the ocean at this point 
during the Eocene. The presence of the Tejon* on the east- 
ern slope of the Coast ranges for a long distance and its rare 
occurrence within the area of these ranges makes it probable 
that they were much more elevated than during the preceding 
Chico or the following Miocene, aiid that this land area con- 
nected with the Klamath mountains on the north. It is in- 
conceivable that, if the Tejon once covered the ('oast ranges, 
it should have been so completely removed from almost all 
interior points. 
Miocene. There is strong evidence that previous to the 
beginning of the Miocene sedimentation a marked subsidence 
took place through the central and southern Coast ranges, 
while in northern California according to Diller§ the Miocene 
was inaugurated with no great disturbance unless a slight 
*Bull. Geol. Soc. Am. vol. iv, p. 219. 
tBull. Dopt. Geol. Univ. of Cal. vol. i, p. 19. 
JXV Annual Report of U. S. Geol. Sur. p. 458. 
§XIV Annual Report U. S. Geol. Sur. p. 42.'). 
