758 GEOLOGY OF OHIO. 
crossing the northern part of Holmes county to the northeast corner of 
Knox, where it turns at right angles to the south, running through the 
eastern part of Knox and Licking counties, the western part of Perry, 
turning here so as to pass through Lancaster, in Fairfield county ; 
touching the western edge of Hocking, and entering Ross at Adelphi, 
in the northeast corner. Here it turns to the west, crossing the Scioto 
Valley a few miles north of Chillicothe, and emerging from the county 
at its southwest corner, proceeding thence through the southeastern 
corner of Highland, the northwestern of Adams, reaching the Ohio 
river in the southern part of Brown county, near Ripley. Cincinnati 
was completely enveloped by ice during the glacial period, and extensive 
glacial deposits exist in the northern part of Campbell and Boone coun- 
ties, Ky., and near Aurora, in Dearborn county, Ind. 
In Indiana the line still continues to bear in a southerly direction 
through Ohio and Jefferson counties, grazing the edge of Kentucky 
again opposite Madison, and reaching its southernmost point near 
Charlestown, in Clarke county. From here it bears again to the north 
through Scott and Jackson counties to the line between Bartholomew 
and Brown, and follows this to the northeast corner of Brown. There 
again it turns to the southwest, touching the northeast corner of Monroe, 
" where it again bears north for ten miles to near Martinsville in Morgan 
county. Here again the line turns west and south, passing diagonally 
through Owen, Green, Knox, and Gibson counties, and into Posey 
county as far as New Harmony, where for the present my investigations 
are broken off. 
The following is a list of the counties and townships traversed by 
the glacial boundary in Ohio: 
OHIO. 
CoLuMBIANA County.—Middleton, Elk Run, Center, Hanover, West. 
Stark County.—Paris, Osnaburg, Canton, southwest corner of Perry, Bethlehem, 
southern part of Sugar Creek. 
Tuscarawas County.—Northwest corner of Wayne. 
Hoitmes County.—Paint, Berlin, Hardy, Monroe, Knox, Ashland, southeastern 
corner of Hanover. 
Knox County.—Jefferson, Union, Butler, Jackson. 
Licking Counry.—Eden, Mary Ann, Newark, western border of Franklin and 
Bowling Green. 
Perry Counry.—Thorn, western border of Reading. 
