/y 
X 
THE 
AMERICAN GEOLOGIST 
A MONTHLY JOURNAL OF GEOLOGY 
AND 
ALLIED SCIENCES. 
EDITORS AND PROPRIETOliS. 
Prof. Samuel Calvim, I'niversity of Iowa, Iowa City, Iowa. 
Prof. Edward W. Claypolk, Buchtel ColJege. Akron, O. 
Dr. Persifor Frazer, Franklin Institute, Philadelphia, Penn. 
Dr. Lewis E. Hicks, University of Nebraska, Lincoln, Neb. 
Mb. Edward O. Ulkico, Geol. Survey of Illinois, Newport, Ky. 
Dr. Alexander Winchell, University of Michigan, Ann Arbor, Mich. 
Prof. Newton H. Winchell, University vf Minnesota, Minneapolis, Minn. 
VOLUME II 
July to Decembek, 1888 
MINNEAPOLIS, MINN. 
1888 
PRINTED BY L. KIMBALL & CO. 
