Strotif/raphy at Slate'ti Springt^. — FairhaiiAs. 353 
in all were found in addition to the plant remains, although 
only a part of them can be even'generically determined. The 
labor of collecting was ver}'^ great for the specimens are spar- 
ingly disseminated through the thickness of slate mentioned. 
It seems that there can no longer be any question as to the 
true stratigraphic position of these beds, that is, that they 
represent a lower horizon than the jaspers. 
The exposure of the strata for five miles with Slate's Spring 
as a center is an interesting one for study. The character- 
istic shearing and silicification are well shown, while there are 
most excellent examples of faulting, flexing, and squeezing 
out of the strata. The basal conglomerate is composed largely 
of boulders derived from the crystalline rocks forming the 
Santa Lucia range. In some of the liner conglomerates there 
are pebbles of an uncrystalline argillaceous rock, pointing to 
an earlier horizon now hidden. Argillaceous patches, some- 
what thready at times ai'e numerous in the sandstone. Some 
of them appear to be of foreign inclusions, while others may 
represent portions of the argillaceous strata mixed with the 
sandstone during shearing, although at present the sandstone 
appears to be perfectl}^ massive. 
The very close resemblance of these beds at Slate's Springs 
to the strata at the base of the same series at point San Pedro, 
even to the inclusion of shaly fragments make it appear that 
both probably belong to about the same horizon. 
Eagle Ranch and Vicinity. 
Following the trip just described the Eagle Ranch, San 
Luis Obispo county, was visited and added proof acquired of 
the unconformable position of the Golden Gate series beneath 
the Knoxville. Just west of the ranch house a pebbly sand- 
stone containing Aucella was found at the base of the Knox- 
ville and overlying the shales, sandstones, and jaspers of the 
former series. On the head of the Atascadero as well as on 
Toro creek the Knoxville shales appear in clean cut contact 
with the green eruptives of the older series. No trace of 
metamorphism was apparent in any ease. 
Bp:kuyessa Canon. 
An excellent section of the Golden Gate series is shown in 
Berrj'-essa canon in eastern Napa county. The Berryessa creek 
cuts through a high ridge of the older rocks, exposing on 
