320 CALIFORNIA ACADEMY OF SCIENCES, 



exposure. Liicina borealis Linn, is very abundant here 

 and a few other Miocene forms were found. At Point 

 Pillar the dip becomes horizontal or a little north and the 

 stacks and long reefs seen at low tide show almost com- 

 plete connection with the blulf's a mile south of Spanish 

 Town. Here is the same rock containing Creptdula 

 grandis Midd. From here to Pescadero Creek the same 

 sandstone makes up the cliffs under the Quaternary wher- 

 ever it was examined. In a low anticline south of San 

 Gregoria Creek it was estimated that about 500 feet of 

 strata were exposed. Layers of pectens were especially 

 abundant at the center of this anticline. At Capitola the 

 thickness actually exposed is small, the rock varying from 

 very soft and friable drab sandstone to the hard layers of 

 the same thing, lime from the contained shells probably 

 causing the difference; the beds here are very fossilifer- 

 ous and the fossils generally fairly well preserved. See 

 plate xxiv. 



These bluffs from Point Pillar to Capitola will doubt- 

 less yield excellent sections when a detailed study of them 

 is made. 



No exposure of sufficient continuity to yield sections 

 of any value were found in the mountains on either the 

 bay or coast side. 



In the mountains over the San Fernando tunnel in Los 

 Angeles county and the foothills in that neighborhood, 

 and in the foothills in the city of Los Angeles, the great 

 thickness of unfossiliferous White Miocene shale is overlaid 

 conformably by a few hundred feet of fossiliferous gravels 

 and conglomerates whose fauna would seem to place them 

 in this Merced series. At San Fernando there appears to 

 be considerable thickness, but the strata are folded and 

 faulted so that it would require some detailed study to es- 

 timate it. In going up the canon leading to the tunnel 



