746 GEOLO&Y OP OHIO. 



The strata have a rapid dip to the south and west from Croxon's Run, 

 and local dips were reported as high as eighty feet in two hundred 

 yards. 



sloan's station. 



About a quarter of a mile above Sloan's Station are the fire-brick 

 works of John Francy. Coal No. 3 here lies about twenty-three feet be- 

 low the railroad. It is from thirty to forty inches in thickness, and of 

 somewhat better quality than where mined further up the river. It is 

 overlain by a stratum of micaceous sandstone twelve to fifteen feet in 

 thickness, which forms a remarkably smooth and firm roof throughout 

 most of the mine. Below the coal is soft, plastic fire-clay, thirteen feet 

 in thickness, which supplies the material for the factory. Under this is 

 a hard, silicious clay,. of unknown thickness, not worked. In one part of 

 the excavation made to remove the fireclay, it was found to assume 

 locally the hard, non-plastic character of the Mineral Point and Mt. Sav- 

 age clays. This phase of our fire-clays is much less uncommon than is 

 generally supposed, as most of them exhibit some local manifestation of 

 it, and although most characteristic of the clay under Coal No. 5, in Tus- 

 carawas county, is only local there, and can not be trusted as a means tor 

 identifying clay seams at distant points. Mr. Francy's works are among 

 the most extensive on this side of the river, producing about two million 

 bricks annually. 



The section of the strata in the hills above Sloan's Station is as follows: 



FT. IM. 



1. Slope concealed 80 



2. CoaZ out-crop, repoited to be 6 



3. Interval, where exposed heavy maBses of gray, with bands of red 

 shale 184 



4. Coal out-orop, reported 6 



5. Clay and shale 18 



6. Coal, reported 1 6 



7. Olive shale 27 



8. CoalNo7 3i to 4 



9. Fire-clay, reported 6 to 7 



10. Interval, principally sandstone, with non-plastic clay, reported 



16 to 18 feet near middle 75 



11. Gray shile 5 



12. Coa! JTo. 5, good qualily 3 



13. Limestone 2 



14. Interval concealed 58 



15. Coal No. i, goodi 2 6 



16. Clay and shale 14 



17. Black shale - 3 



18. Fire-clay 8 



