IOWA ACADEMY OF SCIENCE 
Explanation of Plate III. 
Fig. 1. The wooded bluffs above Florence, Neb. These rounded wooded bluffs are 
the prevailing type on the west side of the Missouri river. (See p. 58.) 
Fig. 2. The abrupt treeless bluffs above Missouri Valley, Iowa. This represents the 
prevailing type on the east side of the river. (See p. 58.) 
