THE MINING AND QUARRY INDUSTRY 967 



NAME LOCATION OF OFFICE 



Cusack & Murray Kings Ferry 



Dunn & Mead Oxford 



F. G. Clarke Bluestone'Co. Oxford 



American Bluestone Co. Warsaw 



Warsaw Bluestone Co. Warsaw 



Theodore Woods Norwich 



Genesee Valley Bluestone 'Co. Bluestone 



Driscoll Brothers & Co. Ithaca 



Peter O'Hara , Trumansburg 



The general condition of the quarrying industry during 1904 has 

 been fairly satisfactory. The demand for structural stone was 

 somewhat below normal, as in the previous year, for which the 

 depression prevailing in the building trade in the larger cities was 

 responsible. An improvement in the demand will probably mani- 

 fest itself during the present year. The bluestone market, on the 

 other hand, was active and absorbed an unusually large output. 



Trap 



The basic dike rocks, commonly called trap, are found at numer- 

 ous places throughout [the Adirondacks and adjacent territory. 

 The largest area in the State, however, is that which outcrops 

 along the lower Hudson southward from Haverstraw, constituting 

 the remarkable scenic feature known as the Palisades. This ridge 

 crosses the Rockland county line into New Jersey, but appears 

 again on the north shore of Staten Island. The trap is a dark, 

 fine grained, crystalline aggregate of plagioclase, augite and mag- 

 netite. It properly belongs to the diabase rock group. It is 

 exceedingly hard and tough, and, unlike most granitic rocks, 

 shows little tendency to rifting or parting along planes of weak- 

 ness, so that it is admirably adapted for paving blocks and road 

 metal, of which the ability to withstand constant wear is an es- 

 sential feature. Though the rock has been used to some extent 

 in buildings, it is too tinyielding in the quarry to be extensively 

 employed for that purpose. 



The principal quarries of trap are those at Rockland Lake, 

 operated by the Clinton Point Stone Co. and the Rockland Lake 

 Trap Rock Co., those at Upper Nyack and Haverstraw worked 

 by the Manhattan Trap Rock Co., and the Long Clove Trap Rock 

 Co., respectively, and the quarries at Port Richmond, Staten 

 Island, worked by the Quinroy Contracting Co. Each company 

 operates crushing plants in connection with the quarries. The 



