544 



PALJE0NT0L0GICAL REPORT OF GEOLOGICAL SURVEY. 



Avicula rectalateraria only. We have mentioned before, that at this 

 place the thick fire-clay below the coal insensibly passes into a hard 

 rock, cut in bluffs, along the river. 



Lewisport, Hancock county, Kentucky. The main coal opened near 

 this place, one and a half miles from the Ohio river, still belongs to 

 No. 9. The vein is not worked, now, but the old shales, though very 

 much decayed, afford materials enough for identification. Among the 

 shales there are some boulders of limestone, or rather nodules of iron, 

 which contain an abundance of the same shells that we found at Mul- 

 ford's, especially Productus muricatus. One mile further west of this 

 place, the same coal is worked now in a small way, for the demand of 

 the town. It has here the same slabby shales, with the same fossils. 

 The main thickness of the coal at both places is four feet to four feet 

 four inches. 



Henderson shaft, Ky. The 9th coal is reached here about one hun- 

 dred and ninety feet from the top of the shaft, as marked in the sec- 

 tion, p.p. 36 to 39 of the first report. The shales of this bed are easily 

 distinguishable in the rubbish, having in them the fossil remains of 

 fishes, and the Avicula rectalateraria- The palseontological identifica- 

 tion is here of small interest, because the shales of the shaft are all 

 mixed together in a heap, and also because the section itself gives the 

 best indication about the place of this coal. This section agrees near- 

 ly foot by foot with No. 1, vertical diagram of the report of the Saline 

 Company, Ind. The distance from the coal, two feet four inches, lit- 

 tle Newburg coal, which is No. 1 1, is one hundred and eight feet, show- 

 ing the total absence of the middle coal. At Saline Company it is 

 one hundred and two feet, and at Shawneetown Company, Ind., one 

 hundred and ten feet. 



Coal No. 1 0. This vein appears to be the most unreliable and in- 

 constant of all. It looks like a wandering bed, sometimes high up, 

 sometimes descending, most of the time entirely absent or joined to 

 No. 11. I would have omitted its description if we had not seen it at 

 Shawneetown Company mine, where it has been scarcely opened. The 

 coal, two to three feet thick, looks brittle and oxidated, an appearance 

 possibly caused by atmospheric influence, and disintegration of the out- 

 cropping part. The roof shales are black, hard, compact, not slabby, 

 but irregularly breaking, and without any traces of shells. The bot- 



