334 
The Aynerican Geologist. 
May, 1897 
a 
a; 
< 
> 
o 
Q 
O 
Maquoketa 
(Hudson River) 
SERIES. 
Wijkoff 
formation. 
{'■'■Richmond 
limestone.'''') 
14. Oithis bed. 
13. Leptfena bed. 
Maquoketa 
{Utica) 
formation. 
12. Orthoceras bed. 
IJ. Diplograptus bed. 
Transition 
formation. 
10. Triplecia bed. 
Galena 
(Trenton) 
SERIES. 
Galena 
(Trenton) 
formation. 
9. Macluiea bed. 
8. Lingulelasma bed. 
7. Camarella bed. 
6. Orthisina bed. 
(Black River, 
4-5.) 
Beloit 
formation. 
('■'Stones River'^ 
or Birdseye, 
1-3.) 
5. Fucoid bed. 
4. Stictopora bed. 
3. Stictoporella bed. 
2. Bellerophon bed. 
1. Buff limestone bed. 
Saint Peter Sam 
istone (Chazy), 150 
feet. 
Shakopee (Uppe 
r Calciferous). 50 
feet. 
