ILLINOIAN AND KANSAN MOLLUSCAN FAUNAS 23 



Thickness 

 (feet) 

 Silt, sandy silt, and clayey silt, calcareous; contorted 

 bands of gray, tan, and rusty brown; highly fossiliferous in 

 local areas but lacking fossils in other areas (P-1369x); con- 

 tains irregular blocks of Pennsylvanian rocks up to 2 feet in 

 diameter; bedded silts that have been plowed up and distorted 

 by a glacier but lack normal characteristics of glacial till; 

 rests directly on bedrock. 6. 



Total 45.0 



WILDCAT CREEK STRATIGRAPHIC SECTION 



Measured in creek bank, NEj NEj NW| Sec. 9, T. 13 N., R. 4 W., 

 Mercer County, Illinois (1962). 



PLEISTOCENE SERIES Thickness 



ILLINOIAN STAGE (feet) 



LIMAN SUBSTAGE 



Glasford Formation 



Kellerville Till Member 

 4. Till, calcareous, gray. 30.0 



3. Gravel and sand, calcareous. 2.0 



Petersburg Silt 

 2. Silt and fine sand, calcareous, laminated, gray with some 



tan. 4.0 



1. Silt, calcareous, massive, dark gray with some tan, humus 



streaks; contains fossil snails in mid part; to level of creek. 14.0 



Total 5 0.0 



