66 



M:\V YORK STATI-: MLSF.IM 



Production of stone in 1907 



a Included under "All other. 



b Included under "Limestone." 



Prcduction of stone in 1908 



alncludsd un'l=r "All othsr." 



Granite 



Under the strict use of the word, granite is an entirely crystalline 

 igneous rock made up of potash feldspar and quartz, with usually 

 small amounts of either mica, hornblende or pyroxene. Among 

 quarrymen and builders, however, the name granite is given to 

 various other types of rocks, such as the heavier and darker colored 

 diorites, norites and gabbros, syenite which resembles granite but 

 lacks quartz, and the bedded or banded rock known as gneiss or 

 schist. The broader use of the term will be employed in this dis- 

 cussion. 



Two main areas of extensive outcrops of granitic or gneissic 

 rocks can be recognized : the Adirondack region and the area com- 

 prising the Highlands of the Hudson. The Adirondack mountains 

 are made up of large masses of crystalline rocks, anorthosites, 

 norites, gneisses and granites, and around the borders of this mass 

 many quarries have been opened. At present there are but few 

 active quarries which are located as follows : West Chazy, Clinton 

 CO. ; Ausable Forks, Essex co. ; Gloversville, Fulton co. ; Little 



