748 GEOLOGY OF OHIO. 
stone Coal” or “ Mud Vein,” because of its proximity to a limestone: 
which underlies it, and of its containing a seam of shale or clay. A. 
hard non-plastic clay is again found here above Coal No. 5, but its value: 
has not been fully tested. A fire-clay 6 feet in thickness, lying 25 feet 
above Coal No. 3, was at one time worked by McFadden & Carlisle, and’ 
was shown to be for some purposes of superior quality. For the manu- 
facture of drain-pipe it was, however, found to be less desirable than the: 
elay under Coal No. 3, and this was therefore used in preference. 
The following section was taken from Knoxville due south to Island 
Creek. 
1. Hill-top at Knoxville, 630 feet above railroad, at Sloan’s Station. 
2. Slope with outcrop of buff limestone .......................... 76 aS 
3: Coaloutcrop, reported (on. eae eee ees sein cieele eS Me b 6 
4. Interval, where exposed, yellow and greenish shales ........--.. 108 ae 
5. Coal. No. 8, Pittsburgh: seam . 2. 2-\.5- 25 eat ooo eeiceee ee ccec eee 4 55 
6i0 Mire-clayetsisescled ce Ca ae ee ee eee OR 8 
7) ‘Buff jdimestone o.oo oes see eo eis Se oclaielcisctanee scree eee 2 6 
8. Interval—shales and limestone where observed...-,.---.-------- 142 . 
9. \\ Hard blue limestone; jcc cs Soo 2e tooo te fea Came ce ls esjeeeiecleinas 3 
102) (Shaleriees Gus bras ps EE De Ge MINN ee See cle os ee aeayaene ats 10 - 
11. |)'Crinoidal limestone 3: jes certs Eee eee Se ee 2 
12. Sandstone and shale to creek.... ...... -22. wee w woe we we eee eee - 153 ne 
The clay works at Sloan’s Station are the last now in operation on the: 
Ohio side in descending the river. The rocks here dip rapidly south- 
ward, and Coal No. 3 and its clay are said to disappear below the Ohio: 
at the northern extremity of Brown’s Island. At King’s Creek, on the 
Virginia side, however, they are seen at about the same level as at. 
Sloan’s Station, and the clay is there used for the manufacture of fire- 
brick. 
Between Sloan’s Station and Brown’s no coal has been found of work- 
able thickness and good quality, although the explorations in search of 
it have been quite extensive. 
Near Jeddo, half a mile from Sloan’s, a coal seam has been opened on: 
the farm of Mr. Campbell, which is apparently the same as that worked. 
by Mr. Thos. Wells, and also with that marked Coal No. 5 in the section 
at Brown’s Station. At Mr. Well’s mine the section is as follows: 
1. Gray shale. 
2. Coal No. 5(?) containing mueh sulphur ..........-. ..---- ---- 24 feet. 
Se WShalene sects chub. Ss cesta tate eas Nee een as eee torctoeis's 6to10 <“ 
Wy (Coates oc sos Sees oe Sherer Beier ee Siete reiticie 3to 4 inches. 
5: Blackishale. sec. ee etek nee ceeiice cineiemetsioncioomecerceceels 1 foot 
6. 
