THE LAKE-BORDER MORAINIC SYSTEM. 401 



from the top down to a quicksand at the bottom. A well in the SE. £ of 

 sec. 2 has a depth of 70 feet and is in till with the exception of 4 feet of 

 surface sand. 



A well in the west part of sec. 25, South Haven Township, is in till from 

 the top to a water-bearing- sand at bottom. A well one-half mile southeast 

 from South Haven, 125 feet in depth, is in till except 5 feet of water-bearing 

 sand at bottom Several tubular wells in the village of South Haven have 

 a depth of about 100 feet. After penetrating a few feet of surface sand they 

 are in blue till nearly the whole depth. Some of the shallow wells in the 

 village obtain water at the base of the surface sand. A boring at the basket 

 factory in South Haven has the following- section: 



Section of boring at basket factory in South Haven, Michigan. 



Feet. 

 Surface sand 10 



Soft blue clay, slightly pebbly, becoming harder toward bottom and containing bowlders in the 



lower 20 feet 130 



Shale of dark color, varying in hardness 207 



Total 317 



On the plain east of Covert Ridge, in sec. 31, Geneva Township, a flow- 

 ing- well was obtained on the farm of J. Irving Pearce. Water rises 7 feet 

 above the surface. The drift is mainly a blue till and has a depth of 190 

 feet. The well was continued 40 feet into the underlying shale. 



A well on the plain east of Covert Ridge, in sec. 29, Casco Township, 

 Allegan County, reached a depth of 140 feet without entering rock. After 

 penetrating 25 feet of surface sand it passed through a thin bed of blue 

 pebbly clay, beneath which it was entirely through fine sand. 



On Covert Ridge, in sec. 25, T. 1 N., R. 17 W., a well 157 feet in depth 

 penetrated 1 8 feet of surface sand, beneath which it was mainly through a 

 blue-gray till. Another well in the same section penetrated 12 feet of sur- 

 face sand, beneath which it was in a blue till to a depth of 146 feet. A 

 well in the northeast corner of the same section penetrates scarcely any 

 surface sand; there is instead a loau^ yellow till 7 feet in depth, overlying 

 the blue till. The latter is slightly pebbly and extends to a depth of 104 

 feet. There is then about 10 feet of stony material of reddish-brown color. 

 This is underlain by blue clay, which extends to the water-bearing sand at 

 130 to 134 feet. 



MON XXXVIII 26 



