GEOLOGY OF EASTERN OHIO. 



593 



Summit near Mechanicsburg, Champagne County .... 



Richland Village, northwest part of Richland County 



Summit between waters of Beaver and Yellow Creek, Columbiana County . 



Hills adjacent to Salineville, Columbiana County .... 



Canfield Academy, Mahoning County ..... 



River hills, Wellsville, on the Ohio ..... 



Hills adjacent to Yellow Creek line between Jefferson and Columbiana counties 



National Road between Jacktown and Gratiot, Licking County . 



Hills south of Zoar, Tuscarawas County ..... 



Summit Cuyahoga and Chagrin Rivers, Geauga County . 



Norwich, Muskingum County ...... 



Summit between Sandusky River and Blanchard's Fork of the Anglaise . 

 Tops of hills near Millersburg, Holmes County .... 



Tops of hills near Newcastle, Coshocton County .... 



Summit of Great Miami and Scioto Rivers, Logan County (about) 

 Northwest corner of Atwater, Portage County .... 



New Chambersburg, Columbiana County (about) .... 



Lime Rock No. One, of the Ohio Coal Series. 



Like the coal, and all other strata of the Alleghany coal-field, the limestone beds are not 

 continuous. For convenience, I designate them by numbers, reckoning from the lowest 

 upward, with the caution that the same numbers do not necessarily indicate the same bed, 

 but only their order of superposition. We have not yet acquired knowledge enough of the 

 structure and extent of these strata to do better. It is very seldom that a bed of this lime 

 rock occurs within one hundred feet of the bottom coal seam. In one instance, in Mr. Foster's 

 profile, along the National Road lime rock No. 1 lies on coal seam No. I, 1 at Brownsville, 

 Licking County. Beginning at the Ohio River, in Lawrence and Scioto Counties, bed No. 

 1 is about one hundred feet above the lower coal. Constructing a geological section, from 

 the Little Scioto south 60° east, to Symmes' Creek, thirty miles, I found in that distance 

 three beds of limestone, four of coal, and seven of iron ore. The average dip is about 

 twenty feet per mile, but in places it is locally much greater, the strata having many undu- 

 lations. In Mr. Foster's section, from Columbus to Concord, in Muskingum County, a dis- 

 tance of seventy-five miles, course about east, there are five beds of limestone, and eight of 

 coal. This is nearly on the line of dip, which varies from twenty-two to forty-eight feet 

 per mile, average about thirty feet. Lime rock No. 1 here rests on the lower coal. Lime rock 

 No. 2 is one hundred and forty feet above, and the Buhr, or " silico-calcareous mill-stone " 

 bed, eighty-five feet higher. Following northerly along the western outcrop on the Wal- 

 honding, in Coshocton County, two miles south of Warsaw, lime rock No. 1 overlies the 

 cannel coal only a few feet, at an elevation of four hundred and three feet above Lake Erie. 

 A bed of bituminous coal intervenes between the cannel and the limestone. Three miles 

 further south, at the head of Simmons' Creek, are two beds of limestone, one 425, the other 

 497 feet A, and two coal beds in close proximity, which are probably different from those 

 in the cannel region. In the valley of the Killbuck, near Millersburg, Holmes Count}', the 

 lower coal and lime rock are near each other; by estimate, within fifty feet. There cer- 

 tainly are three, and probably four beds of coal, and three of limestone, in the adjacent 

 hills, which rise to six hundred and fifty feet above Lake Erie. 



1 See the Profile at the end of this article. 

 memoirs host. soc. NAT. hist. Vol. I, Pt. 4. 149 



