1913] Louderback: The Monterey Series 199 



shales form a low, rolling bench between ocean and Coast Range, 

 2 or 3 miles wide, and from 100 to 200 feet above the sea at the 

 shore to 300 or 400 at the base of the range proper. The bench 

 is cut transversely by streams from the mountains, and along 

 them the shales are well exposed, displaying several folds with 

 axes trending N. 50° W. " 



"The shales of the Monterey in this locality are interlami- 

 nated with sandstones varying in thickness from a foot or two 

 up to 30 or 40. — The shales are brown on fresh fracture, weath- 

 ering to a greenish-gray; they are also clearly bituminous, not 

 only for the locality in question but along the whole of this 

 portion of the coast" (p. 379). 



Berkeley Hills, Lawson and Palache, 1902. — In 1902. Lawson 

 and Palache published 311 the Geology of "The Berkeley Hills," 

 in which is described "The Monterey Series." resting uncon- 

 formably on the Chico (upper Cretaceous), and composed chiefly 

 of siliceous shales and cherts carrying Tellina congesta, Pecten 

 peckhami, fish scales and foraminifera. The series also is said 

 to contain sandstones and limestones, the former carrying unrec- 

 ognizable species of Tapes, Gytherea, Anthomya, Macoma, Lucina, 

 Tellina, and Ncvcrita. Furthermore, "it should be observed that 

 this formation, as exposed on Skyline Ridge, does not represent 

 the entire Monterey series. The series in Contra Costa County, 

 only a few miles to the eastward, is made up of an alternation 

 of four fossiliferous sandstone formations and three formations 

 of 'bituminous shale,' aggregating in all several thousand feet 

 in thickness" (p. 367). 



Middle Coast Ranges, Lawson, 1903. — This Contra Costa 

 County Section had been presented by Professor Lawson before 

 the Cordilleran Section of the Geological Society of America 37 

 in December, 1901, as follows : 



Monterey 



Upper Stage 7, sandstone, 1800 ft. 



r Stage 6, bituminous shale, 670 ft. 



Stage 5, sandstone, 1200 ft. 



Middle < Stage 4, bituminous shale, 1400 ft. 



Stage 3, sandstone, 600 ft, 



L Stage 2, bituminous shale, 250 ft. 

 Lower Stage 1, sandstone, 4(10 ft. 



so Univ. Calif. Publ. Bull. Dept. Geol., vol. 2, see pp. 363-371. 

 " Geological Section of the Middle Coast Ranges of California, Bull. 

 Geol. Soc. Am., vol. 13, pp. 544-545 (1903). 



