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NEW YORK STATE MUSEUM 



given to various other massive rocks that consist chiefly of silicate 

 minerals, such as the heavier and darker colored types included 

 under diorites, norites and gabbros, also syenite which resembles 

 granite but lacks quartz, as well as metamorphic varieties included 

 under gneisses and schists. This usage will be followed for the 

 purposes of the present report, except that the basic dike rocks 

 which are chiefly exploited for crushed stone are treated under the 

 head of trap. 



The granite trade for the past few years has not been in a 

 flourishing condition. The production in 191 1 showed a con- 

 siderable decline compared with the reported total for the pre- 

 ceding year which was well below the output in 1909. The de- 

 crease has been largely in the less valuable grades of crushed stone 

 and paving blocks, but on the other hand the trade in building and 

 monumental granite has failed to reveal any decided upward trend. 



The total production of granite in 191 1 had a value of $148,633 

 against $244,763 in 1910, and $479,955 in 1909. Building stone, 

 rough and dressed, accounted for $30,684 in the total, as compared 

 with $40,911 in the preceding year and $35,019 in 1909. The out- 

 put of monumental stone was valued at $11,353 against $12,989 in 

 1910; crushed stone at $72,401 against $91,988; rubble and riprap 

 at $28,162 against $20,272; and all other kinds at $6033 against 

 $78,603 in 1 910. 



Production of granite 



1909 



Building stone 

 Monumental . . 

 Crushed stone , 

 Rubble, riprap 

 Other kinds a. 



Total 



$35 oi9 



33 818 



182 029 



12 737 

 216 352 



$479 955 



1910 



$40 911 

 12 989 

 91 988 

 20 272 

 78 603 



$244 763 



1911 



$30 684 



11 353 



72 401 



28 162 



6 033 



$148 633 



a Includes curbing, paving blocks and minor uses. 



NOTES ON THE GRANITE QUARRIES OF NEW YORK 



The following notes relating to the granite industry are based on 

 the results of a field investigation carried out during the summer 

 of 191 1, as an initial step toward the preparation of a comprehen- 

 sive account of the quarry resources in the State. Assistance in the 



