368 THE ILLINOIS GLACIAL LOBE. 



A well on sec. 21, one-half mile east of the above, is 125 feet in depth 

 and is almost entirely in sand and gravel. This well is on a prominent 

 knoll. So far as observation was extended, these knolls quite uniformly 

 show a great depth of sand and gravel, with but little till, and that, too, 

 when till is found on the adjacent lower lands. 



On the elevated land north of Hartford, in sec. 11, Hartford Township, 

 au a height of 85 feet (aneroid) above the flood plain of Pawpaw River, on 

 the farm of Samuel Keine, a well 87 feet in depth penetrates: 



Section in Keine icell north of Hartford, Van Buren County, Michigan. 



'Feet. 



Gravelly sanely clay 10 



Yellowish till 12 



Cemented gravel with thin clay beds 60 



Loose gravel with water 5 



Total 87 



A well across the road was sunk to a depth of 160 feet. For a depth 

 of 80 feet its section is similar to the above; below this there is a bed of 

 blue bowlder clay nearly 80 feet thick, which is underlain by water-bearing 

 gravel. It was on Mr. Keine's farm, at a level about 35 feet lower than the 

 surface at the well, that the huge limestone bowlder noted above (p. 357) 

 was found. 



In Bangor Township and in the vicinity of Breedsville, in Columbia 

 Township, deep wells are rare, the usual depth being but 25 to 30 feet. In 

 some cases the wells are largely in till, but in others the section is prin- 

 cipally gravel. There is but little sand on the surface in Bangor Town- 

 ship, compared with that in Columbia Township, and it is exceptional to 

 pass tlnough much sand in sinking a well unless it be on a high knoll- 

 The deepest well in this township of which a record was obtained is in 

 sec. 17, on the highest knoll in the western part of the township, and is 

 interesting, since it is but a few rods distant from one of the large sandstone 

 bowlders noted above. The following is the well section: 



Section of well in sec. 17, Bangor Township, Van Buren County, Michigan. 



Feet. 



Yellowish till -. 5 



Dry sand 15 



Coarse sand with water 3A 



Fine sand 7 



Brownish clay 8 



Sand 66 



Depth 104 



