144 GEOLOGY OF OHIO. 



In going from^Drakesburgh to Garrettsville the surface descends nearly 

 two hundred feet, passing down from a broad ridge or divide, which is a 

 marked feature in the topography, and which stretches connectedly north 

 into the center of Geauga countJ^ The top of this ridge,' or table, is 

 above the coal level from Freedom to Burton, and more or less coal has 

 been found in it all the way, although it is usually thin. 



At Garrettsville the Conglomerate is fully exposed, and rises thirty feet 

 above the d6p&t, or four hundred and eighty-five feet above the Lake. 

 Two miles west of Garrettsville the .base of the ridge referred to is reach- 

 ed, and in the ravine by the road-side the following section is exposed : 



FT. 



1. Coarse sandrock, -with some small pebWes 30 



2. Irregular seam of coal 1 



3. Shale, with bands of sandstone 20 



4. Black shale, ■with iron 1 



5. Sandstone to base. 



The top of this section is one hundred and fifty feet above the depot at 

 Garrettsville, and the coal exposed is probably about the horizon of the 

 thin seam. No. 2, the place of Coal No. 1 being below. 



In Mantua there are many natural outcrops of coal, viz., at the rail- 

 road cut, north-east of the Corners, a few inches (two to four)thick; a 

 mile south of the Corners, on Mr. Blaine's land, sixteen inches; one and 

 a half miles east of the Corners, six to eight inches thick. Three wells 

 drilled near each other in this vicinity gave — 



FT. 



1. Earth 4 



2. Sandrock 36 to 46 



3. Black shale 20 to 40 



4. Gray shale 2 to 4 



5. Coal 4 to 12 inches. 



6. Sandrock (bottom not reached). 



A boring was made one and a half miles south of the Corners, to the 

 depth of one hundred and thirty-six feet, penetrating earth, sandrock, 

 and shale, of which the thickness is not known. Coal was found six to 

 eight inches thick. 



The center of Charlestown rises to the height of five hundred and sev- 

 enty-five feet above the Lake, and an outcrop of coal is visible on the 

 King place, in the road leading to Ravenna, and about fifty feet below 

 the center. This is evidently the Briar Hill seam. The hill on the op- 

 posite side of the valley rises six hundred feet above the Lake, and nearly 

 one hundred feet above the coal level, but the coal, if it exists there, is 

 concealed. The valleys of the streams in this region are ^cut below the 



