THE 
American Geologist 
A MONTHLY JOURNAL OF GEOLOGY 
ALLIED SCIENCES 
EDITORS AND PROPRIETORS 
Florence Bascom, Bryn Mawr, Fa. 
Charles E. Beecher, New Haven. Conn. 
Samuel Calvin, loiva City, Iowa. 
John M. Clarke, Albany, N. Y. Peksifor Feazer, Philadelphia. Pa. 
Edward W. Clatpole, Akron, Ohio. Edward O. Ulrich, Newport, Ky. 
John Eyerman, i^astoa. Pa. Warren Upham, St. Paul, Minn. 
Maeshman E. Wadsworth, Houghton, Mich. 
Israel C. White, Morgantown, W. Va. 
Newton H. Winchell, Minneapolis, Minn. 
VOLUME XVIII 
July to December, 1896 
Minneapolis, Minn. 
The Geological Publishing Company 
1896 , 
The Franklin Printing Co., Printers 
