Prccambric rocks 



out- cropping on 



surface 



Prccambric rocks 

 near surface 



Folded and over- 



thrusted' rocks of 



easterav trough 



Canajoharie shale 



rapidly thickening 



south 



Fig. 17 Diagram to show the blocking of the mineral waters in the 

 Saratoga region by fault blocks of Precambric rocks in the north and 

 west and the thickening cover of shales at the east and south. 



