THE PLEISTOCENE OR GLACIAL PERIOD. 



345 



associated with them (Figs. 480 and 481). Many of the depressions 

 contain standing water. The surface of some parts of the drift, on 



Fig. 480. — A sketch of the drift (terminal moraine) topography near Hackettstown, 

 N. J. (New Jersey. Geol. Surv.) 



Fig. 481. — The topography of the drift shown in contours for an area near Minne- 

 apolis, Minn. Scale approximately a mile to an inch. (U. S. Geol. Surv.) 



the other hand, is nearly plane. Neither planeness nor unevenness 

 can be ascribed exclusively to the stratified nor to the unstratified 



