'IVrtiary ami 

 Pliocene, 



Miocene. 



K.I. '!!'-. 



Cretaceous. 



Jurassic or Oolitic. 



... Triassic (X-w Rr<l Sandstone). 



... Permian. 



..... Carboniferous. 



Devonian or OM K'<1 



-- Silurian. 



- Cambrian. 



Huronian. 

 Laurentian. 



\ OF IIII-. 



OF Till K\KTII. 



