134 
IOWA ACADEMY OP SCIENCE 
Explanation of Plate XII. 
Fig. 1. A cut west of Denver Junction, Iowa, showing Iowan drift below (about 
9 feet exposed), with a line of boulders in its upper part and a covering of 
1-4 feet of loess and soil. (See p. 123.) 
Fig. 2. Third cut west of Afton Junction, Iowa, along the C., B. & Q. R. R. The 
uppermost layer is loess (?), 3-5 feet thick, grading below into glacial clay, 
which rests on Kansan drift. (See p. 123.) 
