Gushing — Potsdam Boundary. 



15 



While the great scarcity of exposures of the Calciferous dolomites renders 

 hazardous any attempt to delineate the Potsdam-Calciferous boundary and to 

 generalize concerning structural relations, the prolongation of the north- 

 easterly strike invariably shown in outcrop would not connect the different 

 exposures, there is but little indication of folding, and a series of north-south 

 faults throwing to the east would furnish a satisfactory explanation of the 

 existing conditions. 



