NOBLE COUNTY. 517 



data, that the fossiliferous limestone is the equivalent of the Cambridge 

 limestone, which, in the vicinity of Cambridge, is about one hundred 

 and twenty-five feet above the Cambridge coal. The existence of the 

 Cambridge seam at Ava is a fact of the highest importance. It can be 

 easily reached by shafts. From this point this very valuable seam will 

 doubtless be found to extend under all the high ground to the north, 

 which divides the waters of Duck Creek from those of Wills Creek. 

 This gives an extensive coal field, bordering the railroad, and tributary 

 to it, reaching from Ava to Cambridge. 



BUFFALO TOWNSHIP. 



This township borders Guernsey county, and has its principal drain- 

 age northward by means of branches of Wills Creek. Its south-western 

 portion is upon the southern slope of the divide, and is watered by the 

 head branches of the West Fork of Duck Creek. The Marietta, Pitts- 

 burgh, and Cincinnati Railroad passes through the divide between the 

 two streams by means of a tunnel. The hills in Buffalo township are 

 probably not high enough to take the Cumberland seam of coal, and in 

 this region the Pomeroy seam has a slight development. The soil of the 

 township is rich from the limestone in the hills. At the " Notch," where 

 the railroad leaves the Duck Creek waters, the following strata were 

 seen: 



Ft. In. 



1. Sandstone (not measured). 



2. Limestone 2 



3. Not seen 20 



4. Limestone 10 



5. Not seen 6 



6. Nodular limestone 5 



7. Not seen 25 



8. Blue fossiliferous shale, with nodules of siderite ore 20 



9. Not seen 2 6 



10. Blue fire-clay -. 10 ° 



11. Ferruginous limestone, fossiliferous (Cambridge limestone) 2 



Bed of stream. (Map XII., No. 23.) 



I have no doubt that the limestone at the bottom of this section is the 

 equivalent of the Cambridge limestone and of the fossiliferous limestone 

 at Ava Station. This would give us the Cambridge seam of coal at a 

 depth of about one hundred and twenty-five feet below the valley at the 

 " Notch." At Ava Station the boring revealed the Cambridge coal, six 

 feet six inches thick, one hundred and twenty-five feet below the lime- 

 stone. We may justly infer that this fine seam extends under Buffalo 

 township. This will give great value to the lands bordering the railroad. 



