52 
LOWER BEDS OF THE RANGE. 
north and east than in the counties traversed by the range in its southern prolongation, it is 
likely that it may have been derived from that source, possibly from the basin east of the Sierra 
Nevada, which may not have risen fully up at the time of the deposition of these beds. This 
bed is not found in the ranges lying to the west. The older conglomerate (serpentine) is derived 
from the degradation of the serpentine and trappean ranges north and east of this. Neither of 
these conglomerate beds contain any trace of fossils. Of the fossils of the sandstone beds notice 
will be made elsewhere. It may be mentioned here that the fine clay bed, the uppermost de¬ 
scribed, (A No. 5,) is found on both sides of the range where examined ; it was also found 
further east, on Panza, (fifteen miles,) in Santa Margarita valley, San Luis Obispo valley, and 
thence on the shore line to near Santa Barbara, a remarkable extent of country, forming a line 
of sixty miles, from north to south, and doubly remarkable when the light and tender nature of 
the stratum—a soft clay rock, impressible with the nail—is considered. 
Figure 5 of plate 2 illustrates the positions of the several strata described. Figures 2 and 3 
of plate 1 also reveal the constitution of the chain. Beds 2 and 3 B are the sandstones of 
Panza, which can be traced to the Monte Diablo range ; they are also the lower sandstones of 
Saint Inez, where they are described. Bed 4 B, east side, is the Santa Margarita fossiliferous 
beds, described when treating of that valley. 
The western slopes of this range in Cuyama valley are terraced for a length of 30 miles ; on 
the eastern side they are terraced also in Panza valley and the lower part of the basin of the 
Estrella creek. 
