THE 
AMERICAN GEOLOGIST 
A MONTHLY JOURNAL OF GEOLOGY 
AND 
ALLIED SCIENCES. 
Editor: N. H. WINCHELL, Minneapolis, Minn. 
ASSOCIATE EDITORS: 
Florence Bascom, Bryn Mawr, Pa. 
Charles E. Bebchek, New Haven, Conn. 
Samuel Calvin, Iowa City, Iowa. 
John M. Clarke. Albany, N. Y. Ulysses S. Grant. Evanston, III. 
Herman L. FAiRCHiLD.iJocftester.iV.F. Oliver Perry Hay, New York.N. Y. 
Persifor Frazer. Philadelphia, Pa. GkorGt. P. Merrill, Wasiins-ton.D.C. 
Warrkn Upham, St. Paul, Minn. 
Israel C. White, Mor^antown, TV. Va. 
Horace V. Winchell, Butte, Mont. 
VOLUME XXXIII 
January to June, 1904 
Minneapolis. Minn. 
The Geological Publishing Co. 
1904. 
The Umvkksity Press of Minnesota. 
