396 THE ILLINOIS GLACIAL LOBE. 



A boring- on the till ridge north of Wheeler, on the farm of Josephus 

 Wolf, 157 feet in depth, has the following section: 



Section of ridge north of Wheeler, Indiana. 



Feet. 



Stony yellow till 15 



Blue clay, slightly pebbly, with occasional thin sand beds 140 



Gravel bed 2 



Another boring on the same farm reached a depth of 200 feet without 

 obtaining water or entering the rock. Usually wells in that vicinity must 

 penetrate about 90 feet of compact clay before entering a water-bearing 

 bed, but in a few places sand with water has been found at 30 feet or less. 



Wells on the till ridge north of the Calumet River, in eastern Porter 

 County, have reached a depth of 150 feet in a few cases without entering 

 rock. One at Bailey, 148 feet in depth, has the following section: 



Section of ivell at Bailey, Indiana. 



Feet. 



Stony yellow till 18 



Dry sand 40 



Bine quicksand 40 



Blue till 50 



Total -. 148 



A well immediately north of Chesterton, 97 feet in depth, has the fol- 

 lowing section: 



Section of well near Chesterton, Indiana. 



Feet. 



Stony yellow till 20 



Soft blue clay, with few pebbles 50 



Dry sand 15 



Sand and gravel, with water ,. 12 



Total 97 



On the same ridge, a mile farther east, the series is still more variable, 

 as follows: 



Section of ridge north of the Calumet River, near Chesterton. 



Feet. 



Stony yellow till 20 



Soft blue clay, with few pebbles 40 



Dry sand 12 



Hard blue till 5 



Sand and gravel, with water 11 



Total 88 



Near the line of Porter and Laporte counties the wells penetrate only 

 . 3 to 5 feet of yellow till, beneath which is a soft blue clay, with few peb- 



