290 



LIFE OF THE PLEISTOCENE 



b. Old Soil Horizons 



Near Danville Junction, Vermilion County, the subjoined section was ex- 

 posed in a well boring. 18 



Yellow till and gravel 20 feet 



Blue till 15 



Hardpan 30 



Blue till _ 15 



Sandy loam 10 



Clay, sand and gravel 50 



Muck bed with wood 8 



Tough blue clay 25 



Sand and gravel 2 



Coal measures x 



The muck and wood appear to overlie the Illinoian drift and hence may be 

 referable to the Sangamon interval. 



Organic remains have been found in a ravine in Richland Creek, Woodford 

 County (sect. 21, T 28, R. 2 W.), the section being interpreted as follows: 19 



1. Soil and yellow clay / ;ft<n , . ,,,,. . * 



,.',,,, c 50-60 feet (Wisconsin) 



2. Purplish clay or hardpan ) 



3. Blue sandy clay, containing fresh water shells 6 feet\ 



4. Rotten drift wood and peaty matter 314 " \ , c > 



5. Blue clay 3-4 » ( < San S am0I1 > 



6. Drift wood and peaty matter 5-6 " ' 



7. Blue clay x " (Illinoian) 



No. 3 of the section contained Lymncea and Succinea, and from No. 4 was 

 obtained American white birch, black spruce, American tamarack and one 

 variety of cedar. No. 6 contained American tamarack. 



In Tazewell County, 20 at Delavan, the following section has been noted: 



Yellow till (Wisconsin) 15 feet 



Blue till (Wisconsin) 60 



Muck and wood (Sangamon) 6 



Green mucky clay (Sangamon) 8 



Gray sandy till (Illinoian) 30 



Gray sand (Illinoian) 122 





Height of section 241 



18 Leverett, Illinois Glacial Lobe, p. 699. 



" Green, Geol. 111., IV, p. 336. 



20 Leverett, Illinois Glacial Lobe, p. 691. 



