THE 
American Geologist 
A MONTHLY JOURNAL OF GEOLOGY 
ALLIED SCIENCES 
Editor: N. H. WINCHELL. Minneapolis, Minn. 
ASSOCIATE EDITORS. 
Florence Bascom, Bryn Miiwr. Pa. 
Charles E. Beichee, New Haven. Conn. 
Samuel Calvin, Towa City. Iowa. 
John M. Clvrke, Albany, N. Y. Persifor Feazer, Philadelphia. Pa. 
Edward W. Claypole, Pasadena. Cal. Ulysses S. (jRANT, Minneapolis. Minn. 
John Eyermax, Ea.ifon, Pa. Warren Uphasi, St. Paul. Minn. 
Marshman E. Wadsworth, Marquettf.. Mich. 
Israel C. White, Morgantown, W. Va. 
VOLUME XXIII 
Januaky to June, 1899 
Minneapolis, Minn. 
Thk Geological Publishing Company 
1899 
The Franklin Printing Co., Printers 
