i8 



NEW YORK STATE MUSEUM 



Hartnagel's section terminating the Manlius with the upper water- 

 Hme is very satisfactory for this area from a Hthologic standpoint. 

 Since the Manhus group terminates the Siluric sediments of this 

 region, it has exceptional interest to the geologist. The thickness 

 and general characteristics of the beds in the group are remarkably 

 uniform across the Syracuse quadrangle, more so than that of the 

 immediately overlying limestones. 



KiMBLR Spring 



James VI LLE 



H. ,-! ,.. . ^ 



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^J_ 



Ca 



Manlius 



Fig. I. Vertical sections of Manlius and associated groups 



At the top of the group is a bed of waterlime generally about 4 

 feet thick, varying slightly in different localities, underlain by 4 to 5 

 feet of blue limestone known in the local quarries as the '' diamond 

 blue." It is a compact, calcareous limestone, comparatively pure, 

 with many joint and fracture planes so that it comes from the quarry 

 in small fragments. The blue limestone is underlain by a second bed 

 of waterlime similar in character and thickness to the upper one. 

 Or we might think of it as one bed of waterlime separated into two 

 by a bed of blue limestone 4 to 5 feet thick through the middle of it. 



