MAP 



Explanatory Notes 



The map which accompanies this report on building 

 stone Is on a scale of fifteen miles to an Inch. In the ab- 

 sence of colors, exhibiting the geological formations and 

 their limits, It Is Impossible to show the quarries of the 

 various geological horizons, as the Potsdam sandstones, 

 Trenton limestones, Lower Helderberg limestones, etc. 

 The number of quarries In some of the quarry districts Is 

 so great, and they are so close, that they cannot be Indi- 

 cated by appropriate signs on a map of this scale. Hence, 

 in some cases, the localities alone are given. Thus West 

 Hurley and Phoenicia, in Ulster county, stand for groups of 

 openings in the blue-stone territory of the Hudson river; 

 Reservation, near Syracuse, for the Onondaga gray lime- 

 stone quarries ; Medina, for the quarries In that vicinity, 

 etc. The quarry localities are distinguished by red lines 

 drawn under their names. 



Many small and comparatively unimportant quarries, 

 which are worked occasionally for private use or at long 

 intervals only, are not given on the map — nor referred to 

 In the report. Stone for building can be quarried at so 

 many points that a geological map, with the rock outcrops 

 shown by appropriate colors and signs. Is necessary to ex- 

 hibit the natural resources of the State In stone for con- 

 structive work. 



The map shows the geographical distribution of the im- 

 portant groups of quarries, and their location with reference 

 to the cities and markets of the State, and the lines of canals 

 and railroads and natural waterways, whereby they are 

 reached. 



It may be noted here that the development of openings 

 has been along these lines of communication, and near the 

 cities, as for example, along the Hudson-Champlain and 

 Mohawk valleys, and the Erie canal. 



