ARNOLD — THE PALEONTOLOGY AND STHATIOKAPHY OF SAN PEDRO. 51 



by the lime leached from shells. The clip of the beds is nearly due south at an angle 

 of lO*-^. The hardened strata are darker colored than the softer beds, and as a rule 

 are more fossiliferous. The fossils in the soft strata are very frafi;ile, but by using 

 care some fine specimens may be obtained from them. 



The fauna of the Packard's Hill deposits is similar to that of the upper 

 horizon of the San Diego formation, and is probably equivalent to that part of the 

 Pliocene which is missing between the Deadman Island Pliocene and the overlying 

 lower San Pedro series (Pleistocene). The close relation between the Pecten hellus 

 Conrad found in the Packard's Hill Pliocene and the Pecten hemphilli Dall of the 

 upper horizon in the San Diego formation is an indication of a more or less close 

 relation between the two formations. Pecten hellus, TerehvatdUa hemphilli, Laqueus 

 jeff'rei/si, and Venus perlaminosa are the most characteristic specimens found at Pack- 

 ard's Hill. 



A bluflf nearly thirty feet in height begins just west of the western end of the 

 beach boulevard at Santa Barbara, and extends southwest along the ocean. For 

 the first eighth of a mile, or along the edge of the llrst cove, the bluff consists 

 of rather evenly bedded, soft, brownish yellow, sandy marl, which dips S. 30"^ E. 

 14". Around the point one-eighth mile southwest of the bath-house the bluff 

 consists of irregularly bedded gravels and sand, which seem at some places to rest 

 unconformably upon the fossiliferous marl beds, although false bedding is so prevalent 

 in the deposits along this bluff that any positive evidence as to the conformability of 

 the strata was hard to obtain. Further southwest along the coast, the gravels and 

 sand rest upon the upturned and eroded edges of the contorted Miocene shales. At 

 one place about half a mile south of the bath-house, where these Pleistocene sands 

 and gravels rest upon the Miocene shales, the Pleistocene deposits were impregnated 

 with asphaltum. In this same place a fragment of the fossiliferous sandstone, similar 

 to that which is found at the northern end of the bluff near the bath-house, was 

 found in the Pleistocene gravels; thus giving evidence that there are two distinct 

 horizons in the Pleistocene along this bluff. 



Alternating strata of sand and gravel, showing false bedding, are exposed in 

 the sea-clifl east of the Santa Barbara wharf. A stratum of shell fragments was 

 found near the western end of this cliff, but no specific determination of the fossils 

 could be made on account of their poor state of preservation. The strata of this bluff 

 are similar to, and probably contemporaneous with, the late Pleistocene strata in the 

 bluff southwest of the bath-house. 



