THE PREGLACIAL DRAINAGE OF OHIO. 51 



Brown's Lake, the surface is very deceiving. The drift seems 

 piled in without order — now rising into hills 500 feet above the 

 lake, and resembling a divide, and now sinking to the plains of 

 the prairie — but a well was drilled here on the plane, at the 

 Brown farm, to water at 170 feet — no rock encountered — and as 

 the well head's elevation was 380 feet, it shows the rock floor to 

 he less than 210 feet above Lake Erie. 



Two miles from this, at Shreve, the elevation is 352 feet, 

 and many wells have been driven to water — the only object 

 sought — which is found in white sand under blue clay at from 

 60 to 105 feet. So I am safe in assuming the rock floor to be 

 less than 200 feet, as the continuance of a channel is unques- 

 tioned. 



Still, if the channel at Shreve should be regarded as a trib- 

 utary from the coal hills of Holmes county- — and here such a 

 preglacial channel does come in — it would not modify the facts 

 given above, nor embarrass my water-way to Wooster, as there 

 is another way for the waters to proceed. A channel which was 

 possibly used during the later history of the coal beds, when 

 changes of level were common, and shiftings of coal into 

 Waverly, and Waverly back into coal, were frequent, is trace- 

 able west of the Shreve hills — in which is found a small pocket 

 of No. 7 coal — and it returns to the axial channel through the pre- 

 glacial channel at Millbrook. 



A very little digging would now turn the Lake Fork into 

 Killbuck. So little that the A. & W. R. R. were afraid to run 

 their track from the clay plant in the Big Prairie to Millbrook 

 through this valley, for their engineer assured them that their 

 track would be flooded if they cut half a mile through the gravel 

 barrier that divides the Big Prairie from the Millbrook valley, 

 as the flood plain of Big Prairie is 150 feet above that of Kill- 

 buck. This channel will be more fully studied in the future. 



On the Troutman farm, near Millbrook, and where the 

 above old channel comes in, a well was drilled on a gravel knoll 

 elevated 376 feet, to the depth of 185 feet, but no rock struck; 

 four furlongs east on the Webb farm, a well was driven to water 

 at 100 feet and no rock encountered; while two furlongs a little 

 south of east, and one furlong from the hill, rock was struck at 



