6o 



NEW YORK STATE MUSEUM 

 Production of granite 



VARIETY 



1912 



1913 



1914 



Building 



$65 487 

 19 130 



49 307 

 27 861 

 40 311 



$45 9ii 

 17 013 



236 650 



9 722 



26 346 



$79 903 

 10 952 



259 750 



Monumental 



Crushed stone 



Rubble, riprap 



Other kinds 



16 637 





Total 



$202 096 



$335 642 



$367 242 





LIMESTONE 



The stone classified under the heading of limestone consists for 

 the most part of the common grades of limestone and dolomite, 

 such as are characterized by a compact granular or finely crystal- 

 line texture and are lacking in ornamental qualities. 



A smaller part is represented by crystalline limestone and by the 

 waste products of marble quarrying which are sometimes employed 

 for crushed stone, lime-making or flux. Limestone used for the 

 manufacture of portland and natural cement is, however, excluded 

 from the tabulations so as to avoid any duplications of the statis- 

 tics. 



Limestones have a wide distribution in the State, the only region 

 which is not well supplied being the southern part where the pre- 

 vailing formations are sandstones of Devonic age. The microcrys- 

 talline varieties occur in regular stratified order in the Cambric, 

 Lower Siluric, Upper Siluric and Devonic systems. In most sec- 

 tions they occupy considerable belts and have been little disturbed 

 from their original horizontal position. On the borders of the 

 Adirondacks and in the metamorphosed Hudson river region, how- 

 ever, they have been more or less broken up by faulting and erosion 

 and in places have a very patchy distribution. 



The Cambric limestones are found in isolated areas on the east, 

 south and west of the Adirondacks. They are usually impure, 

 representing a transition phase between the Potsdam sandstones 

 below and the high calcium limestones above. The lower beds of 

 the Beekmantown formation as originally defined are now known 

 to belong to the Cambric system. The Little Falls dolomite is per- 

 haps the most prominent member of the Cambric limestones and is 

 extensively developed in the Mohawk valley with quarries at Little 



