370 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



From the Great Miami westward along the terminal portions of the 

 morainic loops and northward along- the western limb of these moraines 

 the drift is much thinner than in the eastern limb, and contains a larger 

 proportion of till. The majority of the wells are mainly through till, 

 penetrating but little assorted material, though the water-bearing bed at 

 bottom is usually gravel or sand. On the road from Dayton to Chambers- 

 burg the wells located on the middle moraine penetrate 30 to 40 feet or 

 more of drift, but noj-th of that moraine in the village of Chambersbin-g 

 they penetrate but 6 to 15 feet. West from Dayton, in the vicinit}' of the 

 Soldiers' Home, and northwestward from there in the district lying between 

 the middle and inner members of the moi'ainic system, rock is near the 

 surface ; but in the moraines to the north and south the drift has a thickness 

 of 30 to 40 feet or more, and in Stillwater Valley near Little York its 

 thickness exceeds 100 feet. Along the lower course of Twin Creek, as 

 previously described, the drift is exposed to a depth of nearly 100 feet, but 

 in its upper course there are many quarries along the stream, and the amount 

 of drift filling is slight. In the outer border of the morainic system 3 miles 

 southwest of Germantown, on an elevated portion of the uplands, a well on 

 the "Anderson farm" is reported to have penetrated bowlder clay nearly 100 

 feet without reaching rock. This is the greatest thickness of upland drift 

 reported from this portion of western Ohio. 



At Pyrmont (on the inner member) wells 50 feet deep do not reach 

 rock. At Wengertown, West Baltimore, and Gordon, villages situated on 

 the border of the inner member, wells 30 feet deep do not reach rock. At 

 Ithaca, on the inner member, rock is struck at about 25 feet. Flowing 

 wells are obtained along a small creek in this village at a depth of about 15 

 feet. At Arcanum, near the border of the inner member, one gas well has 

 only 22 feet of drift, but five others have 50 to 55 feet. There is in this 

 village 10 to 20 feet of till at the surface, beneath which the drift is largely 

 sand and gravel. 



At Eaton the waterworks well in Sevenmile Creek Valley, in the north- 

 west part of the town, penetrates 75 to 80 feet of drift, mainly till, but in the 

 southern part rock is struck in the valley at about 10 feet. There may, 

 however, be a deep gorge traversing the valley southward, which has not 

 yet been touched in wells. At Camden, about 8 miles below Eaton, the 

 drift in this creek vallej* has a thickness of 181 feet. 



