S1LURIC FORMATIONS 



533 



Anticostian 



or 

 Alexandrian 



Niagaran 



Series 



or 

 epochs 



Clinton of 

 western N. Y. 



A 



Guelph of Ontario 



Lock port, 130 feet 



Rochester, "^ 



85 feet 1 Same 

 Irondequoit, [ fauna 



14 feet J 



01 



CD 



B 



CD 



H 

 o 



r Williamson, 

 24 feet 

 Wolcott (Fur- 

 n a c eville), 

 14 feet 

 .. Sodus 

 Small break 

 Medina 

 (Oneida) 



Break 



Ohio Clinton, 20-150 

 feet 



Break 



Break 

 Cedarville 



Springfield 



West Union 

 Niagara shales, 50-100 



feet 

 Dayton 



p 



P rt 

 E. ° 



Eg 



° B 

 B 

 P 



Break 

 Brassfield, 13-19 feet 



Break 

 Alger, 83-143 feet 



Indian Fields, 15-20 

 feet 



a 

 p p 

 * * 



- S 'o 



£q 



B 2. 



2- ° 

 «< p 



Break 



Ohio Clinton, 0-20 feet 

 Edgewood, 0-4 feet 

 Girardeau, 0-40 feet 



p 2 Louisville 



5* , A , 



^ Brownsport 



toorqcoc oto " m» a oi S* ^- 2 



MO W^ BC1 » £ 1 2. S - 

 CD CD o> 00 £* CO 



West of Cincinnati axis, 

 Indiana, Kentucky, Ten- 

 nessee 





Break 

 Guelph 



Racine (Reef 1 lime- 

 stone) 



Upper Coral beds, 

 75 feet 



Lower Coral beds, 



70 feet 

 Byron, 140 feet 



Maryville, 1.5-57 

 feet 



Break 



o 



B 

 2. 

 B* 





Break 

 Bertram. Coggan 



r Anomosa, 60 feet 

 Sjj J Le Claire (Reef 

 limestone), 80 

 ° { feet 



Hopkinton, 200 

 feet 



Break 



O 

 P 



52 



