THE 
American Geologist 
A MONTHLY JOURNAL OF GEOLOGY 
ALLIED SCIENCES 
Editor: N. H. WINCHELL, MinneapoUs, Minn. 
ASSOCIATE EDITORS. 
FixiRENCE Hascom, Brijn Maivr, Pii. 
Charles E. Beecher, New Haven, Conu. 
Samuel Calvin, rnwd. City. Iowa. 
John M. Clarke, Albany, N. Y. Persifor Frazer, Philadelphia. Pn. 
Edward VV. Claypole, Pasadena. Cat. Ulysses S. (jRANT, Evanston. III. 
John Eyermax, Ea.ffo.i, Pa. Warren Upham, St. Paul, ^finn. 
Marshman E. Wadsworth, Marquette. Mich. 
Israel C. White, Morgantonm, \V. Va. 
VOLUME XXIV 
.h LY TO December, 18W9 
Minneapolis, Minn. 
The Geological Publishing Company 
1899 
The Franklin I'ljiN'riNt; Co., ^^iIlt»•l■^ 
