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University of California Publications in Geology [Vol.8 



The strata near the axis of the Pico anticline are fine-grained, 

 chocolate-colored, oil-stained, slightly indurated sandstones and shales, 

 which in places show a spheroidal and jointed structure. Above them 

 similar fine-grained beds are interstratified with coarse conglom- 

 erates, which latter become more abundant at higher horizons. About 

 two thousand feet above the lowest zone the coarse beds entirely 

 replace the fine sandy shales. On the north limb of the anticline the 

 beds dip to the north at angles of from 20° to 70°, the steeper dips 

 being near the axis, and the lesser ones at the edge of the valley. No 

 structural evidence of unconformity was found. The lithologic suc- 

 cession is the same in Pico Canon as in Elsmere Canon, where the 

 sandy shales are fossiliferous. The two areas are only a few miles 

 apart and the shaly beds seem to be continuous between them, though 

 the structure is very irregular. It therefore seems probable that the 

 sandy shales in Pico Canon are of the same age as those in Elsmere 

 Canon. 



A collection of fossils 6 was made from a fine-grained sandstone 

 near the upper limit of the interstratified fine-grained beds and gravels, 

 in what was mapped by Eldridge as Fernando. This horizon appears 

 to be stratigraphically above the fossiliferous beds in Elsmere Canon, 

 though the fauna does not differ from that of the latter in character. 



HOLSER CANON LOCALITY 



A collection of fossils was made from near the head of Holser 

 Canon 7 at the locality "five miles northeast of Camulos" referred to 

 by Watts. The fossiliferous strata dip to the south at 50° to 70°, and 

 lie on the south side of an anticline in which lower beds of Fernando 

 are exposed, of a horizon at least one thousand feet lower than those 

 where the collection was made. The fossiliferous beds are composed 

 of poorly indurated, coarse to fine sandstone and conglomerate, and 

 are of a buff to a light brown color. The fossils occur mostly in con- 

 cretionary layers and nodules which, because of their superior hard- 

 ness, form many of the boulders in the beds of adjacent creeks. Eld- 

 ridge included this locality along with other localities in the same 

 district in his lower faunal zone of the Fernando. 



fi U. C, Loc. 1603, Pico Canon, one-quarter mile northwest of superintendent's 

 house, near tank on summit of ridge. 



7 U. O. Loc. 3 637. Steep gulch on north side of small canon near center SW 

 Sec. 12, T. 3 N, R. 18 W, Mt. San Bernardino B. and M. 



