NEOCENE STRATIGRAPHY. 283 



son* suggests that the White Miocene shale or Monterey 

 shale is of volcanic origin. Gravels which he finds there 

 overlying the granite he thinks are of Eocene age. He 

 also differentiates the Pliocene and Quaternary. In a 

 later paper f he summarizes the evidence of post-Plio- 

 cene uplift between San Diego and San Francisco. He 

 describes in a general way the beds on Seven Mile Beach 

 and their structure, calling them all Pliocene and naming 

 them the Merced series. He makes them continuous 

 with the beds in the cliffs at Pillar Point, giving a section 

 from Lake Merced to Pillar Point. 



A number of other geologists have touched the Santa 

 Cruz Mountains, without their reports giving us any new 

 information on the main features of the geology. As for 

 example Dr. J. S. Newberry J and Dr. Thos. Antisell.§ 



GENERAL GEOLOGY. 



Fo7-niations Represented. — The Pleistocene is well rep- 

 resented in belts of nearly level ground, which skirt the 

 mountains on all sides, and form benches up many of the 

 streams. 



The Pliocene is recognized on Seven-Mile Beach and 

 to the southeast. Merced series. 



The Miocene is the formation which predominates. 

 Three facies are recognized. The lower part of the 

 Merced series, very fossiliferous, yellow and drab sands 

 more or less consolidated; the Monterey series, princi- 

 pally a light colored bituminous shale, containing few 

 fossils; the Pescadero series (in part), represented by 

 wide spread yellow sandstone, fossiliferous in places. 



The Eocene is thought to be represented, but no faunal 

 evidence of its presence has been found. 



*Univ. of Cal., Bnil. Dept. of Geol., vol. i, pp. 1 et seq., May, 1893. 

 tUniv. of Cal., Bull. Dept. of Geol., vol. i, pp. 115 et seq. Dec. 1893. 

 t Pacific Eailroad Survey, vol. vi, part ii. 

 § Pacific Railroad Survey, vol. vii, part ii. 



