Whitney's Geology of California. 245 
connection. This is of special interest on two accounts: first, 
the geographical union of these chains of unlike geological 
és; and secondly, because here Kocene strata have formerly 
been supposed to occur. ‘This belief arose from fossils supposed 
to be Eocene found in a boulder near the Cafiada de las Uvas, 
by one of the parties of the Pacific R. R. Exploration. The 
localities whence this boulder must have been derived was ex- 
amined and found to be most unmistakably Cretaceous, a large 
number of characteristic fossils being found. At San Emidio 
Caiion these Cretaceous strata are of inconsiderable thickness 
_ Compared with the enormous thickness of Tertiary that rests 
conformably upon them. 
- Some of this Tertiary would appear from position to be Eo- 
cene, but no unmistakable Eocene fossil has yet been found in 
the state. Certain fossils found near New Idria are of uncertain 
age, and Mr. Gabb inclines to the belief that they may be Eocene. 
Antimony occurs in at least one place, and there has been much 
useless prospecting for silver. : 
In the monntains to the south there has been “copper excite- 
ments,” but thus far with no valuable results; and gold has been 
Washed to some extent, and we believe it still is worked. The 
first gold extracted in California was found as early as 1841, in 
the region between this range and San Fernando valley. 
e thus glanced rapidly at some of the more interest- 
and hence have determined the directions of the larger chains, 
* : 19 i 
wn 
y ven accompanied the earthquakes of recent 
‘years. Hot springs are numerous and occur along nearly the ~ 
ole length of the chain and in many of the ranges. 
In regard to the metallic and mineral wealth, we may review 
_ What has been already stated. as 
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