NEOCENE STRATIGRAPHY. 299 



ocene fossils. It is now believed that Blake was right in 

 placing these with the San Francisco sandstone. 



The sandstone and shale, which is quite typically de- 

 veloped in Telegraph Hill and other hills in the north- 

 eastern part of San Francisco, is found making up a large 

 part of the San Bruno Mountains, just south of the city. 

 It is then found typically developed at Point San Pedro 

 and again at Pescadero Point. The section there gave a 

 thickness calculated at 10,800 feet. Near the southern 

 end of this section are several hundred feet of conglom- 

 erate, and in this conglomerate were found Turritella 

 hoffmanni Gabb, and a few other forms, not yet identified. 

 In the headwaters of Stevens' Creek and Coal Mine 

 Canon occurs a conglomerate indistinguishable from the 

 conglomerate near Pigeon Point, and also containing 

 Tni'ritella hofftnanni Gabb, together with Liro^ecten 

 estrellanus Conrad, Ostrea and Dosina. Again, in Alum 

 Rock Canon in the Mt. Hamilton Range, near San Jose, 

 are found similar sandstones and conglomerate with a 

 similar fauna, and containing also the characteristic Ostrea 

 titaji Conrad, and some other forms. 



The Pescadero section has thus served as a key, showing 

 as it does in continuous section rock very typical of the 

 old San Francisco sandstone, as developed in San Fran- 

 cisco, and conglomerate identical in appearance and 

 fossils with the somewhat abundant fossilif erous sandstones 

 and conglomerates underlying the White Miocene shale. 



The writer visited the original locality from which Pro- 

 fessor Lawson described his " Carmelo Series," and is 

 inclined to the belief that the Carmelo series will be 

 found to be the equivalent of the conglomerate of the 

 Pescadero series. 



In the Coast Range Mountains of Southern California, 

 Dr. Antisell studied the lower Miocene strata in some de- 



