414 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



trend is opened by a road crossing it, wliicli gives an excellent section 20 

 feet deep at the crest of the ridge. In the lower 10 or 12 feet there is 

 a gravel of medium coarseness interbedded with fine gravel. All of the 

 beds arch with the sm-face of the ridge. Above these beds, occupying the 

 summit and western slope of the ridge, are beds of coarser gravel which 

 dip with the slope of the ridge westward at an angle of about 30°. The 

 lower layers extend slightly beyond the summit of the ridge and rest upon 

 the truncated ends of beds of fine gravel that dip eastward. Near the base 

 of the west side of the ridge the gravel beds change somewhat abruptly 

 to till. 



No records of deep borings were obtained along the Scioto Valley 

 below Circleville. A deep gas-well boring in Chillicothe begins in rock, 

 being at the base of a rock ledge. The drift is said to be about 100 feet 

 thick in a gas boring near the bend of the Scioto at Richmouddale, a few 

 miles southeast of Chillicothe, but the exact amount was not ascertained, nor 

 Avas the altitude of the well mouth. The Scioto Valley has probably been 

 filled with drift to a depth of 100 to 2o0 feet along much oi' the course 

 between Columbus and the glacial boundary. 



THE \\'ESTERN LIMB OF THE MAIN LOBE. 



On the comparatively low upland west of the Scioto, at Anderson, a 

 well at Mr. Langdon's penetrated 60 feet of drift. At Mr. Steel's, near 

 Anderson station, in North Paint Valley, wells 32 feet deep obtain water in 

 gravel. On the elevated upland east of Lattas a well at Mr. McConnell's is 

 reported by Wright to have "passed through 12 feet of yellow clay and 6 

 feet of gravel. About 13 feet from the top a. piece of wood 3 to 4 feet long . 

 and 3 inches tlii'ough was found in clay. From this point the eye surveys 

 a vast extent of till in the valley of North Fork of Paint, which is about 

 400 feet lower." At several houses near McConnell's, wells are reported to 

 have penetrated 25 feet or more of yellow and blue till before reaching 

 rock. In the valley of North Paint Creek, near Austin, there is a till 

 exposure fully 50 feet high, yellow for a few feet at top, the remainder of 

 blue color. This valley has but little gravel above Frankfort, but Jbelow 

 that village it carries a comparatively level gravel plain. 



About midway between Lattas and Greenfield are several wells along 

 the Grreenfield and Chillicothe pike which show considerable drift. At 



