190 NEW YORK STATE MUSEUM 



of 2 to 3 mm. There is a little phlogopite in small but visible scales 

 distributed through the carbonates. The marble from these quarries 

 is often beautifully mottled and such material is used in polished 

 work. As a building stone it has been employed in many large 

 structures, notably in the Sacred Heart and St Anthony's churches 

 in Syracuse, and the high school in Schenectady. 



The mill, situated near the quarries, is equipped with eleven gangs 

 of saws. 



Northern New York Marble Company's quarries 



The property of the Northern New York Marble Co. lies in the 

 southwestern section of the Gouverneur district separated from the 

 other quarries by a considerable stretch of undeveloped ground. 

 Its position is east of the extension of the line connecting the more 

 northerly openings, which indicates that it is on a lower vein struc- 

 turally than the others. Otherwise there must be a fault or a wide 

 deviation of the strike in the interval. There is some similarity in 

 the character of the marble with that of the Extra Dark' quarry of 

 the St Lawrence company, which lies on the footwall side of the 

 main belt. The strike of the beds here is N. 70^-80° E. and the 

 dip 80° north. 



The main quarry measures 140 feet by 75 feet at the surface and 

 is over 200 feet in depth. It has been abandoned on account of 

 the depth. A second quarry 100 feet south has furnished the recent 

 output; it is an opening 120 feet long and with a depth of from 40 

 to 65 feet. In 1912 the development of a third quarry was begun, 

 situated to the west of the latter, with which it will eventually con- 

 nect. The quarries are. equipped with two derricks and have the 

 usual oufit of channelers and gadders. 



The marble has a dark blue color for the most part, averaging 

 much darker than the usual Gouverneur product, and is also finer 

 textured. The grain diameter ranges from 0.5 to i mm in the 

 darkest samples. As shown by the analysis on page 186, it is a high 

 grade magnesian limestone with only about 2 per cent impurities. 

 The product is sold under the name of " Northern New York " 

 and is graded according to the presence or absence of lighter veins 

 or clouds in the dark blue ground. It is mainly in demand for 

 monumental work. A good proportion of the lighter quality is 

 hammer-faced, not polished, a finish which gives the appearance of 

 tooled granite. 



