152 NEW YORK STATE MUSEUM 



is mentioned by Beck in the reports of the First Survey as being 

 on the bank of the stream flowing from " Mount Basha " pond, 

 near the Forshee iron mine. It is a contact deposit in Hmestone 

 of which there are exposures in the vicinity of the mine mentioned 

 and also farther north around the opening of the O'Neil mine. 

 Amphibole, pyroxene, garnet and probably magnetite bodies them- 

 selves are accompanying results of the contact action. The occur- 

 rence is mentioned by Whitlock^ as having been worked in 1903. 

 Sheets have been mined that measured as much as three feet in 

 diameter. 



Warwick. According to Whitlock- muscovite occurs near Green- 

 wood lake, 8 miles southwest of Warwick, in a pegmatite vein, the 

 plates reaching a foot in diameter. There are numerous other 

 occurrences of muscovite in this vicinity, as pegmatite has a wide 

 distribution in the crystalline areas of the Highlands. 



Westchester county. A deposit of mica near Pleasantville was 

 at one time the object of mining operations. The occurrence is 

 in pegmatite and the mica belongs to the muscovite variety. The 

 sheets contain magnetite inclusions. 



Muscovite is found in considerable quantity in parts of the Kinkel 

 feldspar quarry at Bedford, but is not of commercial quality, except 

 possibly for ground mica. 



Putnam county. The occurrences in this county have not afforded 

 any commercial mica so far as known. 



Essex county. Mica is found in the pegmatite bodies at Crown 

 Point and Ticonderoga now worked. The chief variety is biotite. 

 Occasional shipments of scrap mica recovered in the milling of 

 feldspar are made by the Crown Point Spar Co. The material is 

 ground and used in paint. 



Large crystals of biotite have been taken from various localities 

 in the town of Keene. 



Saratoga county. A pegmatite body about 2 miles north of 

 Batchellerville, town of Edinburg, was worked some years since 

 by the Claspka Mining Co. for feldspar. Several tons of muscovite 

 were taken out in the course of the operations, the mineral occurring 

 in the spaces between the larger feldspars, or intergrown with the 

 latter. The crystals measure up to a foot or more in diameter and 

 half that in thickness, many bearing very perfect prismatic bound- 

 aries. Inclusions of magnetite arranged in regular lines are frequent. 



^ Minerals not Commercially Important, N. Y. State Geologist 23d Ann. 

 Rep't, 1903, p. 191. 

 2 Op. cit. 



