132 DELOS AND RALPH ARNOLD 
deposits in the vicinity of Newport, which, from their fossil con- 
tents, have been correlated with the upper San Pedro series 
(Pleistocene) by the writers. 
At Bell Station,* near Los Angeles, a typical lower San 
Pedro (Pieistocene) fauna was obtained from a well between the 
depths of 920 and 1,320 feet. This shows the amount of sedi- 
mentation that has taken place in the Los Angeles basin during 
part of the Pleistocene epoch. 
Gravels containing a typical upper San Pedro fauna are 
found at an elevation of about 350 feet on Los Cerritos Hill, 
near Long Beach (see map of San Pedro). The gravel stratum 
dips away from the top of the hill towards the ocean, and is part 
of the same series of sediments which is exposed in the sea cliff 
in front of Long Beach and Alamitos Beach (see Fig. 3). 
REGION BETWEEN SAN PEDRO AND VENTURA. 
The only locality between San Pedro and Ventura which has 
been examined by the writers is near Port Los Angeles. At 
this locality the sea cliff is nearly two hundred feet in height, the 
upper portion being composed of rather incoherent unfossiliferous 
sands and gravels probably of upper San Pedro (Pleistocene) 
age. These upper beds overlie, probably unconformably, hard 
strata of sandstone which contain a fauna similar to that found 
in the lower San Pedro series at Deadman Island. 
VENTURA. 
The most important fact about the geology in the vicinity of 
Ventura is the great thickness, steep inclination, and great 
elevation above the sea of the upper San Pedro (Pleistocene) 
sediments. The range of hills north of Ventura, which have an 
elevation of from five hundred to one thousand feet above sea 
level and which extend for several miles east and west of that 
city, are composed for the most part of soft, thickly laminated, 
yellowish-brown sandstones dipping away from the axis of the 
range. Along the old irrigating ditch which skirts the hills 
east of Matilleja Valley, west of Ventura (see Fig. 6), there is an 
™W. L. WATTS, of. cit., p. 233. ; 
