AMERICAN 
JOURNAL OF SCIENCE AND ARTS. 
[THIRD SERIES] 
*. 
> 
Art. XIII.—Terminal Moraines of the North American Ice-Sheet; 
WaRREN UPHAM. 
estes sand and clay, entirely unstratified ; elsewhere it has 
ew or no bowlders, and consists of rounded gravel and sand 
but not beyond it; while in Wisconsin these morainic hills are 
the glacial drift. The former series is thus shown to have been 
accumulated when the ice-sheet had its greatest extent; but 
+ . of Wisconsin, vol. ii, 1877, pp. 205-215 and 608-635. 
of the State Geologist for the year 1877, pp. 9-22. 
+ Annual 
Am. Jour. Sct.—Tuimp Series, VoL. XVIII, No. 104.—Aveust, 1879. 
: 6 
