100 Bulletin of Laboratories of Denison University, [voi. xir 



Tennessee line to Newberne, North Carolina, designates the 

 rocks of the copper belt area as "Huronian slates." 



Mr. Hanna^ describes the copper belt in Person and Gran- 

 ville counties in detail from the standpoint of economic miner- 

 alogy. He designates the rocks as schists and slates, and re- 

 gards them as decidedly chloritic rather than argillaceous, as 

 described by Emmons. Hanna gives the following quotation 

 from a report by Dr. Jackson. 



"The strata are occasionally disrupted by dikes; about half a 

 mile from the Gillis, and dipping eastward to it, is a dike bearing N. 

 20 E., containing abundant sprigs and grains of disseminated native 

 copper. Epidote occurs both in the trap rock and in the quartz, and 

 in the slate strata near the dike, which seems to indicate that the trap- 

 pean rock is of the same geological age as the quartz veins." 



Mr. Lewis' describes areas of medium fine and compact 

 grain biotite granites, occurring immediately to the east of the 

 copper belt proper, in Granville and adjoining eastern counties. 



In his description of the iron ore deposits in the north- 

 western part of Granville county, Mr. Nitze^ makes the follow- 

 ing reference to the rocks: "Geologically they [iron ores] 

 occur in the crystalline slates and schists, . . . lying 

 conformably between slate walls. . . . " He further 

 mentions small crystals of magnetite occurring in gray micace- 

 ous schist coated with malachite. 



Nitze and Hanna^ mention in "Gold Deposits of North 

 Carolina" the principal copper mines in the copper belt, giving 

 assays of the ores and describing in some detail the topography 

 and general geologic features. They designate the rock as 

 schist. 



Pages 37 to 43 of the same report describe the occurrence 

 of ancient acid volcanics found in the same belt, but directly south- 



' Ores of North Carolina, 1888, p. 215. 



' Notes on Building and Ornamental Stones, First Biennial Report, N. C. 

 Geol. Survey. 1893, p. 75. 



' Iron Ores of North Carolina, N. C. Geol. Survey, Bulletin No. i, 1893, 

 p. 47; Engineering and Mining Journal, 1892, Vol. 53, p. 447. 



* Gold Deposits of North Carolina, N. C. Geol. Survey, Bulletin No. 3, 

 1896, p. 52. 



