SVSTEM 



Siluric 



Clinton t 



S 



u 



Richmonl 



Lorraine 

 Frankforl 

 Utica sha 



Upper Tr 

 Middle T 

 Lower Tr 

 Black Ri\ 



and Lei 



stone 



Chazy lim 



Beekmant 

 stone 



Cambric 2 



Schaghtic< 



1 This in part replaces tl 

 5 It is still a mooted que 







