416 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



At Soutli Charlestown a well at a saloon north of the Little Miami 

 station does not reach rock at a depth of 75 feet. 



In Ijondon one gas- well boring penetrates 165 feet and another 200 

 feet of drift. In both wells the drift is mainly till. A flow of water comes 

 from the rock at a depth of 250 feet. At the waterworks in liondon there 

 is a strong vein of water in gravel below till at 60 feet and another at about 

 150 feet. 



Chamberlin some years ago called attention to hillocks of angular 

 gravel and disturbed stratification between London and Midway, Ohio.^ 

 Several other exposures in that vicinity exhibit the phases of gradation from 

 till into gravel, and the angularity of pebbles in the gravel to which Cham- 

 berlin called attention, but no other instances of disturbed stratification were 

 observed. From the frequent occurrence of gravel pits it is inferred that 

 nearly all the knolls in the vicinity of London and Midway ma}" contain 

 gravel in their deeper portions, even where the surface is till. Less diffl- 

 culty is experienced here in obtaining gravel for road ballast than in some 

 of the later moraines of the Scioto lobe. In the morainic system under 

 discussion gravel knolls are sufficiently abundant throughout its entire 

 length to furnish graVel at convenient points for all the pikes. 



Two borings for oil near Vienna Cross Roads penetrate 265 and 245 

 feet of drift, mainly till. One is located 1 ^ miles east and the other a half 

 mile south of the village, each at an altitude 1,200 feet or more above tide. 



At Mechanicsburg a gas boring near the station penetrated 130 feet 

 of drift, and one at Major Baker's, on an elevated drift ridge, penetrated 

 230 feet, the rock surface being at about the same altitude in both wells, 

 925 feet, more or less, above tide. In Baker's well the upper 100 feet is a 

 clay with comparatively few pebbles; the remainder is a very pebbly clay 

 with but little sand or gravel interbedded with it. Several wells have 

 been obtained at about 120 feet in the vicinity of this village, in gravel 

 below till. 



At Catawba village Eli West has a well 215 feet in depth which did 

 not strike rock. The upper 125 feet was mainly through soft blue till. 

 Beneath this is a harder and more sandy till, which is probably Illinoian. 

 The lower 25 or 30 feet is a soapy clay with few pebbles. 



At Fountain Park there are several flowing wells whose depth ranges 



Am. Jour. Sci., May, 1884. 



