38 
GEOLOGY. 
and metamorphic masses, some of them a yard in diameter, and confusedly intermingled with 
smaller masses and coarse gravel. It also contains pebbles of porphyry, and other volcanic 
rocks. This is a portion of a continuous series of drift accumulations and erratics that are 
found along the slope flanking the Sierra in this region, and they hear evidence of having been 
transported by a powerful current from the mountains. 
TEJON. 
In ascending the slope of the Tejon several Indian rancherias were passed. The ground 
about them appeared to have been rudely cultivated, irrigation being resorted to. Other por¬ 
tions of the plain were dry and gravelly. Further up the slope, however, and along the creek, 
fine groves of oak trees were found and an abundance of excellent grass. We crossed the creek 
and encamped in a beautiful grove, not far from the camp of Messrs. Ridley and Brooks, who 
have made some improvements and cultivated a number of acres. 
TEJON DEPOT CAMP. 
Mountains are visible from our camp on all side!? hut those on the southwest are distant and 
are on the western side of the southern end of the Tulare plain. They are the southern portion 
of the Coast Mountains, and appear to curve around so as to unite with the southern end of the 
Sierra Nevada. The mountains on the east of camp—the Sierra Nevada, if they may he so 
called—are without snow at this season, and are much lower than the portion of the chain further 
north. The first ridge of the chain may he said to he on the west of us, the same we crossed 
when travelling from Posuncula river ; hut the principal ridge is in full view on the east, and is 
about three miles distant. Its surface is brownish yellow, and is partly shaded by oak trees 
standing apart, at wide intervals. 
