<U ' 
THE 
American Geologist 
A MONTHLY JOURNAL OF GEOLOGY 
AND 
ALLIED SCIENCES 
EDITORS AND PROPRIETORS 
Florence Bascom, Bryn Mater, Pa. 
Charles E. Belcher, New Haven. Conn. 
Samuel ('alvin, Iowa City, Iowa. 
John M. Clarke, Albany, N. Y. Persifoe Feazee, Philadelphia. Pa. 
Edward W. Claypole, Akron. Ohio. Ulysses S. Grant, Minneapolis. Minn 
John Eyeeman, Easto.i, Pa. Warren Upham, St. Paul, Minn. 
Marshman E. Wadsworth, Houijhton, Mich. 
Israel C. White, Morgantoivn, W. Va. 
Newton H. Winchell, Minneapolis, Minn. 
VOLUME XXI 
January to Juxe, 1898 
Minneapolis, Minn. 
The Geological Publishing Company 
1898 
The Franklin Printing Co., Printers 
