ST. -MARYS OR FORT WAYNE MORAINE. 577 



The only wells, so far as ascertained, which reach the bottom of the 

 drift in tlie Indiana portion of the moraine are in the vicinity of Fort 

 Wayne. A gas-well boring made near the Pittsburg, Fort Wayne and 

 Chicago Railroad, 2 miles east of the court-house, penetrated 100 feet of 

 drift. The driller described it as being mainly blue till in the upper half, 

 but having alternations of till with sand and gravel in the lower half, the 

 till beds being 5 to 6 feet and the sand and gravel beds somewhat thicker. 

 Seven borings made in Fort Wayne and vicinity show a range from 62^ to 

 123 feet in the thickness of the drift. The public water supply is partly 

 from wells in the drift at depths of 40 to 60 feet and partly from wells in 

 rock at 250 to 450 feet. 



At New Haven, just east of the moraine near the head of the old lake 

 outlet, a prospect boring for gas struck rock at about 50 feet below the bed 

 of the Maumee at that point, the amount of drift being 69 feet. 



The thickness of the drift along the crest of the moraine east and 

 southeast from Decatm- may be about the same as its height above the rock 

 outcrops at and above Decatur (60 to 75 feet), though no records were 

 obtained in that part of the moraine of wells sufficiently deep to reach rock. 



Frank Williams, a well driller residing at Avilla, Ind., has raade several 

 deep wells near Maples, in Allen County, which penetrated till 70 or 80 

 feet, and at this depth entered a bed of bowlders which, he thinks, has a 

 definite horizon near the base of the till, for few bowlders are encountered at 

 a lesser depth in the wells. 



From Fort Wayne northeastward the drift increases in thickness to 200 

 feet or more, as shown by deep wells. A well 198 feet deep, on the farm 

 of Chi'istian Hirsch, about 1 mile southeast of Spencerville, in Dekalb 

 County, Ind., does not reach the bottom of the drift. It passes tlirough 

 the following beds : 



Section of Hirsch well, near Spencerville, Ind, 



Feet. 



Yellow till 8-10 



Blue till 50-60 



Sand, about 120 



Cemented gravel 9 



Total 198 



A dozen or more wells in the neighborhood penetrate 60 to 70 feet of 

 till and obtain water in the sand and gravel which underlie it. A well at 



MON XLI 37 



