152 NEW YORK STATE MUSEUM 



The value of bluestone quarried for all purposes in 1905 was 

 $1,369,244, or approximately 67 per cent of the total sandstone; 

 the value of the other sandstone quarried was $674,716 or 33 per 

 cent of the total. The tables show that there was a slight falling 

 off in the amount of sandstone quarried but enough increase in 

 the amount of bluestone to make the total amount of sandstone 

 quarried larger than that reported in the preceding year. 



The production of bluestone by districts was as follows : Hudson 

 river, $382,769; Delaware river, $512,618; Wyoming county, 

 $208,983; Chenango county, $155,678; other districts, $109,196. 

 Of the sandstone quarried, Orleans county reported an output 

 valued at $518,105 and other counties an output valued at $156,611. 

 A more detailed classification of the product that would cover each 

 county separately has been found impracticable, since many of the 

 large companies which operate quarries at several localities are 

 unable to divide their output according to the different sources. 

 The relative rank of the principal counties of the State was, how- 

 ever, as follows in the order of their importance : Orleans, Ulster, 

 Delaware, Wyoming, Sullivan, Chenango and St Lawrence. 



The foregoing table shows that of the bluestone quarried along 

 the Hudson river in Albany, Greene and Ulster counties, about 82 

 per cent was sold as flagstone and curbstone and about 15 per cent 

 as building stone. In the Delaware river districts, including Sulli- 

 van, Delaware and Broome counties, the value of the flagstone 

 and curbstone sold amounted to 86 per cent and the building stone 

 to 12 per cent of the total. In Chenango and Wyoming counties, 

 on the other hand, almost the entire output was marketed as build- 

 ing stone, the value of flagstone and curbstone being less than 3 

 per cent of the total sales. The output of Medina sandstone in 

 Orleans county was used chiefly for the following purposes : building 

 stone, 14 per cent ; flagging and curbing, 23 per cent ; paving 

 blocks, 52 per cent ; other purposes, 10 per cent. 



Trap 



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

 ous places throughout the Adirondacks and adjacent territory. 

 They are particularly well represented in the Champlain valley, 

 where a great number of occurrences have been described by Kemp 

 and others. Among the more accessible localities for these rocks 

 are Saratoga Springs and Fort Ann on the southern border of the 

 A(lirondack gneiss area. A diabase dike, 20Q feet wide, and trace- 



