72 
IOWA ACADEMY OP SCIENCE 
Explanation of Plate VI. 
Fig. 1. Section along the Interurban railway in Madison township, Johnson county, 
Iowa, south of the Iowa river. It shows alternating bands of sand and 
fossiliferous loess, especially in the upper part. The lower portion shows 
a thicker stratum of loess. These bands vary in thickness from a fraction 
of an inch to several feet. (See p. 60.) 
Fig 2. A part of a section at Gladstone, 111., showing laminated loess resting on 
stratified sand, the two blending more or less, and showing some interlami- 
nation. The loess is fossiliferous. (See p. 60.) 
