io8 



NEW YORK STATE MUSEUM 



secured from the cross section of the quarry than from a descrip- 

 tion. It was not possible to name with certainty the rock forming 

 the floor of the quarry. A reasonable suggestion is that it is the 

 Hague gneiss. The north end of the section ends in a limestone, in 





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which several prospect pits have been dug. Four fault lines have 

 been drawn in the section ; the one in the quarry being the only one 

 that could be demonstrated, the others are inferred. 



Diabase dikes. It will be noticed from the geological map of 

 the Saratoga sheet 1 that to the west of the mine there are three 



N, Y. State Mus. Bui. i6q. 



