184 NEW YORK STATE MUSEUM 



Similar deposits occur at the old Ulster mine, 1 mile east of 

 Red Bridge, and at a mine formerly operated for lead 2 miles 

 northwest of Wurtshoro, Sullivan co. 



Ancram, Goliimhia co. At the Ancram lead mines about 4 miles 

 southeast of the town of Ancram, chalcopyrite occurs in the 

 quartz which forms the gangue in the lead-bearing veins. For 

 a further description of this occurrence, see under Lead. 



St Lawrence county. Chalcopyrite was found associated with 

 the galena at the Rossie lead mine, which has long since ceased 

 operation, and at the pyrite locality near Hermon noted undier 

 that mineral. Small quantities of this mineral have been found 

 associated with the arsenopyrites of Edenville, Orange co., and 

 at many other localities in unimportant amounts. 



Cuprite, the red oxid of copper, has been noticed in thin seams 

 in the diabase near Ladentown, Rockland co., a locality which 

 also furnished an occurrence of malachite, the gi'een copper car- 

 bonate. Both minerals here occur in extremely small quantity. 



5 Lead. The lead deposits of New York, which were formei*ly 

 worked to a limited extent, consist principally of galena, a sulfid 

 of lead. This mineral is dark gray in color, with a cubic cleavage 

 and metallic luster, and closely resembles metallic lead. Small 

 quantities of cerussite, a white carbonate of lead, have been found 

 associated with the galena in some localities. 



Rossie^ St Laivrence co. The lead mines of Rossie, which were 

 operated quite extensively from 1836 to 1839, are situated abou/t 

 2^ miles southwest of tlie village of Rossie. The deposits consist 

 of several veins in gneiss^ the largest having a width from 2 

 to 4 feet with an outcrop exposed for about 450 feet. The ore 

 consisted of galena, massive or frequently crystallized in large 

 cubes, and associated with crystallized calcite, pyrite and chal- 

 copyrite. Shafts were sunk to a level of about 150 feet and 

 considerable ore extracted. The workings were however aban- 

 doned in 1839, and though they were reopened for a brief period 

 in 1852, they have been inactive for forty years.^ Similar deposits 

 occu'r in the vicinity of Macomb and Mineral Point in St Law- 

 rence county. 



Smyth, C. II. jr. School of Mines Quarterly. 1903. 24:421. 



