602 THE JOURNAL OF GEOLOGY. 



above Campbell's ranch, and twenty miles above the U. S. 

 Fisheries. The rock is a dark calcareous argillite, with strike a 

 little west of north, and dip 30 E. This place is three miles 

 east of the McCloud limestone, and considerably above it in the 

 section. 1 The writer did not visit this locality, but Mr. H. W. 

 Fairbanks, of the State Mining Bureau, obtained the information 

 given, and also collected the following fossils : 



Avimlopecten sp. 



" aff. crenistriatus , Meek. 



Streblopteria sp. 

 Conocardium sp. 

 Chonetes sp. 

 Productus mnltistriatiis, Meek. 



" miiricatiis, Phillips. 



" nebrascensis, Owen. 



" semireticiilatus, Martin. 



" subhorridus, Meek. 

 Orthis tnichelini, Leveille. 

 Athyris subtilita, Hall. 

 Retzia radialis, Phillips. 

 Spirifer lineatus, Martin. 

 Spiriferina cristata, Schlotheim. 

 Rhynchonella sp. 



These beds are the probable equivalents of the Robinson beds 

 of the Taylorsville region, and of the Little Grizzly creek beds, 

 Plumas county, 2 which seem to form the top of the Carbonifer- 

 ous formation. The boundary of these Carboniferous argillites 

 could not be found, but they probably make up the lower 

 thousand feet of the Pitt formation. 



The Triassic shales and conglomerates. Triassic fossils that 

 belong to the Muschelkalk, or Middle Trias, were found in the 

 siliceous shales at Silverthorn's ferry on Pitt river, several hun- 

 dred feet above the Carboniferous strata. The fossils found 

 there were : 



Trachyceras whitneyi, Gabb. 



Popanoceras ? 



1 H. W. Fairbanks, Geology and Mineralogy of Shasta County, p. 38. 

 2 H. W. Turner, American Geologist, Vol. XIII., 1894, P- 2 3 I - 



