'AMEBIC ORDCmCIC £IL D CARBONIC 
Iowa Academy of Science. 
Plate III. 
Cherokee Shales 
St. Louis Limestones 
Keokuk Limestones 
Burlington Limestones 
Chouteau Limestones 
Hannibal Shales 
Louisiana T. imestojj.es . 
Saverton Shales 
Grassy Shales ’ 
Snyder Shades- 
Callaway Limestones 
Sexton Dolomites 
Bowling Or. iT.imestones 
Noix Limestones 
Pufallo Shales 
McCune Limestones 
Bryant Limestones 
Joachim Dolomites 
Si Peter Sandstones 
Jefferson Dolomites 
/ 
Magnitude of the Cap-au-Gres fault. 
5 
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