ULL. GEOl. SOC. AM. 



1Z 'J: 



nr 



— 



InJitn.H 



iSic&rd 



Tinxb. . 

 100' **K^_^fi/voonty 



113' 



Wa.Uup£7F**Littyor}( 



aZndian.4 H. 

 I bo ' fir i est) 



I Iowa Hill. 

 \ (nearly level) 

 aWiscons. H. 



Atyf/s 



'9 



fan'kee.Oimj 



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