THE 
AMERICAN GEOLOGIST 
A MONTHLY JOURNAL OF GEOLOGY 
ALLIED SCIENCES. 
Editor: N. H. WINCHELL, Minneapolis, Minn. 
ASSOCIATE EDITORS; 
Florence Bascom, Bryn Mawr, Pa. 
Samuel Calvin, Iowa City, Iowa. 
John M. Clarke, Albany, N. Y. 
Herman L. Fatrchild, i?oc/3ester,N^. K Oliver Perry Hay, New Yotk,N. Y 
Persifor Frazer, Philadelphia, Pa. George P. Merrill, PVasi/ng-ton.D.C. 
Ulysses S. Grant, Evanston, 111. Charles S. Prossbr, Columbus, O. 
Warren Upham, St. Paul, Minn. 
Israel C. White, Morg-antown, W. Va. 
Horace V. Winchell, Butte, Mont. 
VOLUME XXXIV 
July to Decemher, 1904 
Minneapolis, Minn. 
The Geological Pcblishlng Co. 
1904. 
Tub Univbrsitv Press of Minnesota. 
JD 
