532 GEOLOaY OF OHIO. 



A large part of the interval between the blue limestone and the Lower 

 Coal, in the section given, is occupied by a sand-rock which appears very 

 conspicuously above the Kirkendall coal. This is often reduced to a thin 

 band, the thickness of the shale being correspondingly increased. 



The following sections illustrate these changes : 



J. P. Burton's bank, Fairview — 



FT. IS. 



Earth and gravel 13 



Black shale 40 



Sandstone 10 



Blaek shale 3 to 4 



Coal 4 to 7 



On section 26, Chippewa township — 



FT. nj. 



Earth 9 



Sand rock 56 



Gray shale 31 



Black shale 15 



Coal 4 6 



Shaft at Chippewa Mine — 



FT. IN. 



Clayaudshale 33 6 



Sandstone 30 



Clayshale 8 



Iron ore 1 



Clayshale 11 



Sandstone /. 15 



Gray sandstone 4 



Shale 2 



Bony coal 1 6 



Good coal 4 



Drill-hole on Huntz's farm, Chippewa township ; shaft since sunk — 



FI. IS. 



Earth 10 6 



>Qulckaand 6 6 



Sandstone 3 



Shale 14 



•Calcareous iron ore 1 



Blackshale 22 6 



Coal 5 



Silver Creek Mining and Railroad Company's property — 



• FT. K. 



Earth 19 



Gray sandstone 6 



White sandstone : 9 



