'jd NEW YORK STATE MUSEUM 



Bedford. The largest shippers of feldspar for pottery and other 

 purposes in the State have been the quarries in Bedford township, 

 Westchester county. The Kinkel quarries, on the hill southwest 

 of Bedford village, are among the largest of their kind and have been 

 actively worked for many years. They include several large pits 

 in a pegmatite mass or boss whose outlines and extent have not yet 

 been fully revealed. A notable feattire is the coarse crystallization 

 of the component minerals which in the case of quartz and feldspar 

 attain unusual sizes. There is some graphic intergrowth of the two, 

 but as a rule they are well segregated and both feldspar and quartz 

 products are obtained. The feldspar includes microcline which is 

 sold for pottery use and albite of which there are two grades according 

 to the amount of admixed quartz, the higher grade finding use for 

 enamelling and the more siliceous quality for glass. The quartz 

 by itself is used in wood fillers and silica paints. Beryl, tourmaline 

 and several rare uranitmi minerals are found here. Muscovite 

 occurs in large sheets but is badly fractured and not suitable for 

 cutting. 



The Bedford Feldspar Co., a few years ago, opened a pit a few 

 hundred feet north of the Kinkel quarries on the extension of the 

 same deposit. The material is of the same character though contain- 

 ing less quartz than parts of the older quarries. The company ships 

 its product in ground form for tile, enamel and glass manufacture. 



The Bullock and Hobbey quarries are in the same section of West- 

 chester county, but about 2 miles south of the former locality. The 

 Bullock is west of the Hobbey and like the latter is based on a dike 

 with a northeasterly trend. The pegmatite shows a high degree of 

 mineral segregation, with little intergrowth of the quartz and feld- 

 spar, and the product largely is no. i grade, of which microcline 

 constitutes two-thirds and albite one-third approximately of the 

 total. The quarry face is 30 feet wide. At the Hobbey quarry 

 the body is considerably larger, and the quarry opening is fully 100 

 feet wide. The feldspar here is likewise well segregated; individual 

 masses 10 feet across are found. 



References 

 Bastin, E. S. Economic Geology of the Feldspar Deposits of the United States. 



U. S. Geol. Sur. Bui. 420, 1910 

 Emmons, Ebenezer. Porcelain, Clay and Feldspar. Geol. Rep't of the 2d Dist. 



(for 1838) 1839, p. 203-12 

 Newland, D. H. Quarry Materials of New York. N. Y. State Mus. Bui. 181, 



1916, p. 154-175 

 Ries, H. Clays of New York, Their Properties and Uses. N. Y. State Mus. 



Bui. 35, 1900, p. 841-43 



