90 NEW YORK STATE MUSEUM 



There is a little pyrite in evidence, mainly collected along stringers 

 and occasional knots of silicates. The marble seems to be delimited 

 on the west by a hard white quartzite which forms the higher part 

 of the ridge and is exposed 75 feet west of the quarry opening. 

 The strike of the marble beds is a little east of north. The quartz- 

 ite intervenes between these quarries and that of the Dover White 

 Marble Co. 



At the cutting works at Wingdale, the company has a complete 

 equipment for cutting, planing and polishing its product. 



The Dover White Marble Company. The Dover White Mar- 

 ble Co. has a quarry and mill on the east bank of Tenmile creek 

 about one and one-half miles northwest of the quarries of the 

 South Dover Company. The quarry is about 100 feet square and 

 20 feet deep on the west or downhill side and 40 feet on the east 

 side. The marble is rather uneven in appearance, showing small 

 bands of gray which are more pronounced in the western section 

 and which are regarded as variations of bedding. The bands are 

 of sericitic and quarzitic nature, derived from argillaceous and 

 sandy layers included in the limestone. The beds strike N. io c 

 E. and dip 8o° E. They undulate in folds and the siliceous layers 

 are often squeezed out into lenses around which the marble has 

 flowed under pressure. An imperfect jointing is present along the 

 direction of the bedding. Blind checks and seams cause consider- 

 able loss in cutting. The grain is finer than that of the South 

 Dover product, averaging less than .5 mm. 



The product has been employed mainly for veneer and wains- 

 coting. The blocks are sawed across the bedding, or horizontally, 

 as they lie in the quarry. The company ceased active work in 

 April 1912. 



In the southern part of the region in W r estchester county and 

 the Bronx no systematic quarry operations have been carried on 

 in several years. Some of the quarries of this section, like those 

 at Tremont, Tuckahoe and Pleasantville, were operated at one 

 time on a large scale for architectural stone. The marble makes a 

 good appearance, being mostly clear white, but is very coarse 

 grained. On that account it is not so suitable for interior or pol- 

 ished work as the marble from the more northerly quarries. The 

 only use that is made of the stone at present is for lime or crushed 

 stone. 



At the Tuckahoe quarries, formerly worked by Norcross Bros., 

 the Emerson-Norris Co., of New York, has erected a plant for 



