164 
GEOLOGICAL REPORT-THIRTY-FIFTH PARALLEL. 
roules par beds, on isoles ; a stratification tout- ; 
a-fait indistincte et confuse, excepte que la 
masse est elevee de 15 a 45 degres par la 
Sierra Nevada et plonge a l’est. 
Le caiion a 4 milles de long et est forme sur- 
tout d’une roche metamorphique noiratre, avec 
veines de quartz ; on trouve aussi du granite. 
18 Mars. — Du 87' era 88'.—On sort du Cajon 
Pass, et l'on suit le pied ouest de la Sierra 
Nevada. Les roches sont des sienites noira- 
tres, comme avant hier. II y a des cones de 
d^gagement des montagnes, avec cailloux 
roules, pas tres-gros. 
20 Mars. — Du No. 88' au 89'.—On est con- 
stamment sur un sol recouvert d’herbe, sans 
voir les roclies sous-jacentes. 
21 Mars. — Du 89' au 90'.—On trouve pres de 
la ville de Los Angelos une petite ligne de col- 
lines ou il y a du drift quarternaire. 
sand, hardened, with rolled pebbles, isolated, 
or in beds. The stratification is quite indis¬ 
tinct and confused, and the mass is upraised 
from 15 to 45 degrees by the Sierra Nevada, 
and dips to the east. 
The caiion is four miles long, and is princi¬ 
pally formed of a blackish metamorphic rock, 
with veins of quartz. We also find granite. 
March 18.— From Camp No. 150 to Camp 
No. 151.—We left the Cajon Pass and followed 
the western foot of the Sierra Nevada. The 
rocks are blackish sienites, like those in the 
journey of day before yesterday ; and there are 
cones formed from the wash ( degagement ) of 
the mountains with rolled pebbles, but not 
very large. 
March 20.— From Camp No. 151 to Camp 
No. 152.—We were continually upon a soil 
covered with grass, without seeing the under¬ 
lying rocks. 
March 21.— From Camp No. 152 to Camp 
No. 153.—We found near the town of Los 
Angeles a slight line of hills, where there is 
quartenary drift. 
