THE MINING AND QUARRY INDUSTRY IQI2 8I 
Production of marble 
VARIETY 1910 I9II IQI2 
BR MCMMee MANO. es cals kk es aes cee es $252 965 | $171 748 | $155 411 
MMiGa nme Mba te NCE cose tis Stas cs eas wks 88 684 79 115 84 511 
OuE@P TRSTOVCLSSe sk a aera eit en Sr men teee ee rae 231 27 178 I 925 
“TRO So Bice eure eek nes MEN POR OGE ut $341 880 | $278 O41 $241 847 
NOTES ON NEW YORK MARBLE QUARRIES 
The marble resources of the State have been described only in a 
very general way, and the published information is mainly contained 
in the reports of the Tenth Census and Smock’s bulletin on “ Build- 
ing Stone in New York” which reflect conditions as they existed 
_ twenty-five years or more ago. The following account of some of 
the developed quarries has been prepared from observations made 
in the summer of 1912, intended as a basis for a detailed geological, 
petrographical and chemical study of the subject. 
Gouverneur district. The principal area of crystalline lime- 
stones with their interbedded gneisses, schists and quartzites, which 
together represent the Grenville series of the Adirondack region, 
is exposed in southwestern St Lawrence county and the contiguous 
part of Jefferson county in the interval between the Adirondack 
highland and the St Lawrence river. The area is irregular in out- 
_ line, but is drawn out along a northeast-southwest direction which 
is the main structural trend of the region. The northeastern section 
in Canton and DeKalb townships, St Lawrence county, consists of 
a narrow belt a mile or so wide, but as it continues southwesterly 
into Gouverneur, it expands so as to cover most of that town and 
the adjoining towns of Macomb and Rossie on the north and west, 
narrowing at the county line and soon terminating in the towns of 
Antwerp and Theresa, Jefferson county. The total surface covered 
by this body of Grenville strata may be placed at approximately 
175 square miles. 
Throughout the area, the limestone is the most persistent and 
conspicuous member of the series, but it gives way locally to mi- 
caceous, pyritic schists, graphitic or glassy quartzites and dark horn- 
blende gneisses and amphibolites. The several formations have the 
appearance of an interbedded but strongly folded, compressed and 
altered series of sediments. Subsequent to their folding and meta- 
a 
