LEAD ALONE. 157 



minor veins cut the Trenton limestone near Lowville, Lewis 

 County, sometimes with fluorite for a gangue. 1 



2.05.05. (2) Massachusetts, Connecticut, and eastern New 

 York. Veins of galena with more or less chalcopyrite and pyrite 

 in a quartz gangue in gneiss, slates, limestones, or mica schists. 

 The mines near Northampton, Mass., were formerly well known, 

 although never productive of a great deal of metal ; but as there 

 is a large, prominent vein, it attracted attention. There are nu- 

 merous others in the same region. Veins also occur at Middle- 

 town, Conn., where much silver is said to be found in the galena. 

 More recently (circa 1873) at Newburyport, Mass., argentiferous 

 galena attracted attention, but was not of any importance. Other 

 veins are known in Lubeck, Me., and in various parts of New 

 Hampshire and Vermont. For a time small lodes in the slates of 

 Columbia County, New York, were unsuccessfully exploited, of 

 which the Ancram mine is of historic interest. Although these 

 galena veins are numerous, they are not to be taken too seri- 

 ously. 2 



2.05.06. (3) Southeastern Pennsylvania. Veins on the con- 

 tact of Archaean gneiss and Triassic sandstone and diabase. These 

 were referred to under Example 2lb. As noted by Whitney, the 

 copper is especially strong in the sandstone, and the lead in the 

 gneiss. Trap dikes are abundant, and the eruptive phenomena in 

 connection with them doubtless occasioned the activity of circula- 

 tion which filled the veins. The Wheatley mine is best known. 

 It has afforded a great variety of lead minerals, especially pyro- 

 morphite. They have not been worked in years. 3 



2.05.07. (4) Davison County, North Carolina. Veins in tal- 

 cose slate were formerly exploited, but are now little known, 



1 L. C. Beck, Mineralogy of New York, p. 45. E. Emmons, " Geology 

 of the Second District," N. Y. Geol. Survey, 1842. G. Hadley, "Crystal- 

 lized Carbonate of Lead at Rcssie," Amer. Jour. Sci.,i\., II. 117. F. L. Na- 

 son, " Calcite from Rossie," Bull 4, N. Y. State Museum, 1888. J. D. 

 Whitney, Metallic Wealth. Rec. 



2 C. A. Lee, "Notice of the Ancram Lead Mine," Amer. Jour. Sci., 

 i., VIII. 247. A. Nash. " Notice of the Lead Mines and Veins in Hampshire 

 County, Massachusetts," Amer. Jour. Sci., i., XII. 238. R. H. Richards, 

 "The Newburyport Silver Mines," M. E., III. 442. J. D. Whitney, Me- 

 tallic Wealth. 



8 H. D. Rogers, Geol. of Penn., II. 701 ; also Amer. Jour. Sci., ii., 

 XVI. 422. J. D. Whitney, Metallic Wealth, p. 396. 



