280 The American Geologist. May, 190%. 
colored feldspar. This contains several inclusfons, one just 
northwest of Gorman’s Station, of dark brown mica schist, 
light gray gneiss and white, coarsely crystalline limestone or 
marble. Another spot of marble about 50 by 100 feet in di- 
mensions occurs in the granite on the summit a little west of 
north from Gorman’s Station. Similar limestone inclusions 
are known to occur in the San Emedio range a little further 
westward. This very coarse crystalline white limestone is 
quite unlike the blue micaceous limestone schist of the Pelona 
and Abrams schists and. evidently belongs to a different series 
yet it occurs in characteristic and unmistakable form rather 
widely distributed in southern California. The Santa Fe 
Railway company has dumped along its roadbed between Bar- 
stow and San Bernardino, the same kind of marble but con- 
taining black specks which are apparently graphite; this it 
probably derived from the old quarries near Colton. Similar 
limestone occurs among the older rocks in the Santa Lucia 
range, and according to the reports of Whitney’s survey, in 
the Tehachapai range near the Canada de las Uvas and in the 
Gavilan range, all characterized by graphite. 
Fraser mountain and the lower country south to Piru 
creek are mainly of gneiss (including the fine-grained and 
coarse conglomerate-like varieties in parallel belts and cer- 
tainly the same series as that described from the Santa Clara 
River valley), and of schist, with intrusive granite of the un- 
sheared Mesozoic series not much developed although it oc- 
curs in dikes and other limited areas. A considerable area of 
the schist occurs just southwest of Fraser mountain and dis- 
plays a dark brown, medium-grained mica schist. This dif- 
fers in important respects from the Pelona and Abrams schists 
and apparently belongs to a different series. It is identical 
with the schist which is found in connection with the white 
limestone near Gorman’s Station. Similar schist seems to be 
associated with the same limestone in the Santa Lucia range. 
I think we now have evidence enough to establish another 
series of schists and limestone which for convenience in dis- 
cussion may be designated the San Emedio series. Although 
it occurs usually as fragments included in or at least intruded 
by the Mesozoic granites, I believe it displays regional and pre- 
Mesozoic metamorphism. It is thoroughly crystalline and its 
