64 



NEW YORK STATE MUSEUM 



Stones and the Lockport dolomite furnish material for most require- 

 ments, though they are as a rule rather impure. In the northern 

 section the Trenton and Chazy limestones and the Precambric cry- 

 stalline limestone are well represented and in some localities are of 

 very high quality. The Hudson river region has an important 

 quarrying industry which is based on limestones of various ages, 

 ranging from the Precambric crystalline series in the Highands of 

 southeastern New York to the Salina and Helderberg limestones of 

 the eastern counties. Besides the hard limestones as noted, there are 

 unconsolidated calcareous deposits or marls which are found in 

 swamps and old lake beds, particularly in the central and western 

 parts of the State. They are utilized to some extent for cement 

 manufacture and for fertilizer. 



The limestone quarries rank first in importance among the stone 

 industries. The product for 1910 was valued at $3,245,807, and was 

 distributed among 32 counties. The returns showed a slight de- 

 crease as compared with the output in 1909 which was valued at 



$3,300,383- 



Erie county has the largest product of any county, with a value 

 of $866,335 for last year. Onondaga county ranks second, its im- 

 portance being chiefly due to the operations of the Solvay Process 

 Co., a large consumer of limestone in alkali manufacture. Then 

 follow in order Dutchess, Jefferson, Genesee, Warren, and Albany 

 counties, each reporting a product of more than $100,000. 



The distribution of the limestone by counties and also according 

 to uses is shown in the accompanying tables. 



Production of limestone 



MATERIAL 



1908 



1909 



1910 



Crushed stone 



$1 647 629 

 401 728 

 245 655 

 230 117 



|i 744 314 

 452 874 

 217 109 



434 311 



82 748 



15 363 

 b353 664 



$1 815 809 



365 839 



99 049 



538 491 



30 819 



3 888 



&391 912 



Lime made 



Building stone 



Furnace flux 



Rubble, riprap 



Flagging, curbing 



15 668 

 b579 038 



Miscellaneous 





Total 



$3 119 835 



$3 300 383 



$3 245 807 





" Included in " Miscellaneous." 



'' Includes lime made by Solvay Process Co. and Union Carbide Co., also rubble and riprap. 



