1913] 



Louderbaclc: The Monterey Series 



197 



the bulk of which consists of diatoms, associated with radiolaria 

 and foraminifera, and showing abundant impressions of Pecten 

 peckhami Gabb. 



Southern Coast Ranges, Fairbanks, 1898. — In the same year, 

 Fairbanks published a general account of the Geology of the 

 Southern Coast Ranges, 33 particularly in the vicinity of San 

 Luis Obispo, in which he describes the "Monterey series (Lower 

 Miocene). With the beginning of the Neocene a subsidence 

 commenced and continued through, or nearly through the Mio- 

 cene. Finally, almost the whole Coast Range region was sub- 

 merged and a thickness of rocks in many places of more than 

 7000 feet was deposited. The most characteristic feature of 

 the series is the bituminous shales. They form its upper portion 

 and reach a thickness of 5000 feet. Below them are limestones, 

 clays, volcanic ash. sandstones, and conglomerates. . . . The 

 sandstones and conglomerates at the bottom of the series are 

 most prominently developed in the region lying east of the Rin- 

 conada Valley, between it and the main granite range" (p. 561). 



Point Reyes Peninsula, F. M. Anderson, 1899. — In a paper 

 on the geology of the Point Reyes 34 Peninsula, 1899, F. M. 

 Anderson describes the there developed representative of this 

 period of deposition under the head of "Miocene Sediments," 

 consisting of conglomerates up to 300 feet thick, resting on the 

 granite, and occasionally very coarse, followed everywhere by 

 light yellowish sandstones and then whitish, thin bedded siliceous 

 shale. The latter is said to be the "white Miocene shale of the 

 Monterey series, well known in the Coast Ranges." On the 

 Point Reyes peninsula "The series is entirely conformable, and 

 doubtless all belongs to the same period of sedimentation." 



Coast Range Bituminous Rock Districts, Eldridge, 1901. — In 

 1901 (or 1902) Eldridge published a general survey of "the 

 Asphalt and Bituminous Rock Deposits of the United States" 33 in 

 which the Monterey rocks of California were given the following 

 general description. 



33 Jour, of Geo!., vol. •> (1898), this series described pp. 561-563. 

 3* Bull. Dept. Geol. Univ. Calif., vol. 2, pp. 119-153. Miocene, pp. 

 134-141. 



35 U. S. Geol. Surv., 22d Ann]. Rept., Part I, pp. 209-452. The main 

 points of this paper were presented later in Bull. 213, pp. 296-305, 1903. 



