46 FRANK COLLINS BAKER 



calcareous concretions, and the habitat of the contained Hfe all 

 point to the possibility of its being low-land loess. 



STATION NO. 4 



Locality: Illinois Central Railway cut, Boone County, about 

 \ mile northwest of depot at Irene, northeast side of cut, NW. \, 

 Sec. 29, T. 43 N., R. 3 E. 



Material: Where fossils were collected the drift section was as 

 follows : 



Feet 



6. Soil, dark, loessial, sparse pebbles About 2 J 



5. Till, leached, dark buff day, hard i| 



4. Calcareous till, yellow on dry surface, grayish yellow with pinkish cast 



on damp surface, limestone pebbles; dark till in lower 6 feet About 15 

 3. Stratified, yeUow, calcareous sand, no pebbles; numerous pelecypods 



and other moUusks About 5 



2. Blue-gray calcareous sUt with numerous mollusks; exposed 2 



I. Bottom of cut, uncovered 5 



Stratigraphic horizon of Nos. 2 and j: Post-Illinoian andpre-early 

 Wisconsin, possibly Sangamon. 



MOLLUSCAN LIFE 



Fossils were obtained from Nos. 2 and 3 as noted: 



No. 3 No. 2 



. . . Musculium rhomboideum, i, fragments 



Pisidium costatum, common. Pisidium costatum, abundant. 



Planorhis altissimus, common. 



Galba palustris, common. Galba palustris, rare, immature. 



Succinea vermeta, rare. 



The blue-gray silt, No. 2, indicates a quieter body of water 

 than the yellow sand. No. 3, and the mollusks bear out this inter- 

 pretation. 



STATION NO. 5 



Locality: Ten rods southeast of Station No. 4, northeast side 

 of cut. 



Material: The cut shows the following section: 



Feet 



II. Soil, dark, loessial, sparse pebbles 2J 



10. Leached till, dark buff, clayey, hard i J 



9. Calcareous till, yellowish when dry, grayish yellow with pink tinge 



when damp, contains limestone pebbles 7 



