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IOWA ACADEMY OF SCIENCE 



2. Another important cut is just west of the depot at Del- 

 mar Junction, on the north side of the tracks. This cut has 

 a maximum depth of about twenty feet, is one hundred yards 

 long and its summit is round. The materials exposed are as fol- 

 lows (figure 14, A) : 



Fig. 14 A — Diagram of relations of materials in the north face of the Chi- 

 cago, Milwaukee and St. Paul railway cut, just west of the depot at 

 Delmar Junction, Clinton county. 

 Fig. 14 B — Diagram of the relations of the materials in the north face of the 

 Chicago, Milwaukee and St. Paul railway cut, six miles east of Delmar 

 Junction, Clinton county. 



Feet 

 [■ 7. Sandy loess, buff, well stratified, leached, 

 thin soil zone at the top, conforms to the 

 rounded summit of the underlying mate- 

 rials; maximum thickness 10-12 



Till, brownish yellow to yellow, calcareous 

 matrix, limestone pebbles present together 

 with other drift pebbles up to the base of 

 the loess where there is a concentration of 

 pebbles; maximum thickness 8± 



Loess 



Kan san 

 Till 



6. 



Till, blue-black, containing some wood, line 

 of oxidation above quite sharp, probably 

 due to organic material, but calcareous 

 like the above; thickness 



1-3 



Aftonian 

 Silts 



Sub- 



Aftoxiax 



Tux 



4. Silts, dark brown, laminated, appear to have 

 much carbonaceous substance, leached; 

 thickness 1-1% 



Grades downward into: 



3. Silts, gray, laminated, leached 3 



2. Till, brownish yellow to yellow, with maroon 

 streaks and some lamination, pebbles and 

 cobbles up to 6 in. in diameter, leached 

 4% ft. in one place, calcareous and lime- 

 stone pebbles present elsewhere up to the 

 base of the gray silts, some decayed 

 pebbles; thickness, maximum 8± 



1. Till, bluish drab, calcareous; thickness. 



0-3 



