THE MINING AND QUARRY INDUSTRY I912 2Q 



these quarries to the Bridgeport Wood Finishing Co., for use as 

 wood filler. In addition, Kinkel & Son grind some quartz at a 

 mill south of the quarries. 



The latter company opened a new quarry in the spring of 19 12, 

 on the Bullock property, 2 miles south of the Bedford quarries. 

 The opening lies west of the Hobby quarry on a parallel lens or 

 dike. The pegmatite body measures about 30 feet in thickness, 

 strikes northeast and dips 8o° northwest. The wall rock as seen 

 near the contact is a mica schist resembling the Manhattan schist 

 farther south. The opening into the hill is about 75 feet long and 

 shows a face 30 feet high. It can be deepened considerably without 

 difficulty, as the present level lies near the summit of the hill. The 

 feldspar differs from the Bedford varieties in that it is practically 

 all of buff or cream-color and is shown by microscopic examination 

 to consist of an intergrowth of microline and albite. The two 

 kinds form alternating bands with the microline predominant, in 

 the proportion of 2 or 3 to 1. In the Bedford quarries, the two 

 varieties are segregated into a red microline and a white albite. 

 There is very little intergrowth of feldspar and quartz and most 

 of the product is shipped as no. 1 grade. The feldspar builds 

 crystals that measure up to 2 or 3 feet in diameter and which occa- 

 sionally show well-defined faces. The quartz is of smoky appear- 

 ance. There is some muscovite in their scales and sheets associated 

 with the feldspar, but it is mostly segregated. A black tourmaline 

 and dark red garnet are among the accessory constituents. 



GARNET 

 The production of abrasive garnet in the Adirondack region has 

 continued from year to year with little change. The annual total 

 usually is between 4000 and 5000 short tons, now and then slightly 

 exceeding the latter figure. This seems to indicate a fairly stable 

 market which affords the basis for a small and somewhat special- 

 ized industry, but which could hardly accommodate any large addi- 

 tional supplies of the mineral, as have been in prospect at different 

 times, without radical readjustment of the present conditions. So 

 far, no permanent or serious competition has developed as the 

 result of mining operations in other sections of the country. For 

 the last few years, however, there has been an importation of 

 Spanish garnet which fills some of the requirements formerly met 

 by the local product. 



