STRATIGRAPHY OF CALIFORNIA COAST RANGES. 425 
sandstone and slate. They are followed downward by a thick 
conglamerate, while other layers of similar conglomerate are 
exposed, im) the edgevor the ocean Whe) whole series) has) an 
exposed thickness of 1500 feet from the base to the ocean cliffs, 
and extends an unknown distance beneath the sea. The slates 
and sandstones form a narrow belt, at times almost cut out by 
bodies of eruptive origin, for a number of miles down the coast. 
They gradually widen out to form the great area of pre-Knoxville 
rocks of the Santa Lucia Mountains in southern Monterey and 
northern San Luis Obispo counties. Four miles south of Slate’s 
Springs and north of Big Cafion bodies of jasperoid rocks are 
associated with the sandstone. On the ridge south of Big Cafion 
are a number of outcrops of red jasper. At the mouth of Mill 
Creek is another body of jasper. Near the mouth of Vicente 
Creek slates outcrop along the cliffs facing the ocean, bearing the 
closest resemblance to those at Slate’s Springs. A short distance 
south of Vicente Creek there are large outcrops of a banded red 
jasper. The Slate’s Springs beds thus appear to be both strati- 
graphically and lithologically continuous with the Golden Gate 
series which on Pine Mountain underlies the Knoxville beds 
unconformably. Mr. Anderson, who has given considerable 
study to the Cretaceous of Oregon and northern California, 
agrees entirely with the writer with regard to the strongly 
marked lithological contrast between the strata at Slate’s Springs 
and the Cretaceous, and their resemblance to portions of the 
Auriferous Slate series. 
THE TIME INTERVAL BETWEEN THE KNOXVILLE AND THE 
GOLDEN GATE SERIES. 
The great deformation exhibited by the Golden Gate series, 
its much higher degree of solidification and partial metamor- 
phism, the numerous included bodies of eruptives formed prior to 
the deposition of the Knoxville, and the marked nonconformity 
between it and the Knoxville, all point to a time interval of con- 
siderable extent, during which there were violent disturbances 
terminating in its elevation and erosion. This interval may 
