REPORT OF THE DIRECTOR AXD STATE GEOLOGIST 1903 183 



Specimens have been obtained from an old shaft about 40 feet 

 deep, and the deposit, which consists of arsenopyrite, appears 

 to be of the nature of a mass rather than a vein.^ These locali- 

 ties have been opened but not worked for arsenic. 



3 Chromic iron ore. Chromite, an iron chromate of variable 

 composition, constitutes the chief source of the chromium pig- 

 ments and of bichromate of potash used in calico printing. It 

 is, furthermore, used to a small extent in the production of 

 chromic steel. 



Small amounts of chromite have been noted at the following 

 places in Xew York State. . 



Phillipstown, Putnam co. Chromite occurs sparingly in the 

 serpentine of Heustis's quarry about 5 miles northeast of Cold 

 Spring. Occasional crystals have been met with in this locality. 



Monroe^ Orange co. Minute octahedral crystals of chromite 

 occur at the Wilks or Clove mine about a mile souith of the town 

 of Monroe. The mineral is here found in talc associated with 

 magnetite. 



4 Copper. Though of relatively uncommon occurrence in New 

 York State, copper ore is represented by several vein deposits, 

 which were formerly worked in connection with the lead deposits 

 in which it occurred as an associated mineral. The ore con- 

 sisted of chalcopyrite, or copper pyrites, a sulfid of iron and 

 copper. Cuprite, or red copper oxid, and malachite, the green 

 basic carbonate of copper, also occur sparingly in isolated 

 localities. 



Copper pyrites 

 Ellenville, Ulster co. Chalcopyrite, in both crystallized and 

 massive varieties, is found associated with the galena and 

 sphalerite and disseminated through the crystallized and mas- 

 sive quartz. The mine, which has recently resumed work, con- 

 sists of a vein of galena and sphalerite about 3 feet wide in- 

 Oneida conglomerate and is situated about J of a mile from the 

 railroad station. An incline runs to a depth of 115 feet with 

 side galleries. 



^Mather. N. Y. Geol. Report. 1839 



