UNIVERSITY of ILLINOIS. 
THE 
American Geologist 
A MONTHLY JOURNAL OF GEOLOGY 
ALLIED SCIENCES 
EDITORS AND PROPRIETORS 
Florence Bascom, Bryn Matvr, Pa. 
Charles E. Belcher, New Haven. Conn. 
Samuel Calvin, Iowa City, Iowa. 
John M. Clarke, Albany, N. Y. Persifor Frazee, Fhiladelijhia. Pa. 
Edward W. Claypole, Akron. Ohio. Ulysses S. Grant, Minneapolis. Minn. 
John Eyerman, aastoa. Pa. Warren Upham, St. Paul. Minn. 
" Marshman E. Wadsworth, Houghton, Mich. 
Israel C. White, Mon/antown, W. Va. 
Newton H. Winchell, Minneapolis, Minn. 
VOLUME XIX 
January to June, 1897 
Minneapolis, Minn. 
The Geological Publishing CoMrANv 
1897 
The Frankt in Printing Co., Printors ^ 
