THE 
AMERICAN GEOLOGIST 
Vol. XI. FEBRUARY, 1893. No. 2 
NOTES ON A FARTHER STUDY OF THE PRE- 
CRETACEOUS ROCKS OF THE CALIFORNIA 
COAST RANGES." 
By Hauold W. Fairbanks, Berkeley, Cal. 
Plate IV. 
In the American Geologist for March, 1892, I advanced 
proofs of the pre- Cretaceous age of the metamorphic rocks of 
the Coast ranges. Since that time field work has taken me over 
nearly the whole extent of the southern Coast ranges, from San 
Francisco to Ventura county, where these ranges unite with the 
Sierra Nevada. From the latter point the complex series of 
mountain chains of southern California were examined to the 
Mexican boundary. Many new and interesting facts were brought 
to light; one of the most important of which was the discovery 
of Carboniferous fossils in the metamorphic rocks of the Santa 
Ana range, which had been classed by all former observers as 
Cretaceous. It was found also that though the topography of 
southern California is complex, the geological structure is far 
more simple than has been supposed. Although the Miocene 
Tertiary covers a large part of the southern Coast ranges, so that 
the granite and metamorphic rocks cannot be traced continuously 
* Read before the CTeological Section of the Science Assoc, of Univ. 
of Calif.. Nov. 22d, 1892. 
