PALJEOKTOLOGTCAL REPORT OF GEOLOGICAL SURVEY. |547 



of this limestone being indicated by a thin bed of yellow ferruginous 

 clay, with fossil shells, we referred this bed to the same coal 11, with 

 some doubt. 



Pigeon's Run, Hopkins count//. This coal is No. 11, eight to nine 

 ■ feet thick. It has a clay parting, and is covered with four to five feet 

 of black shales, always containing the same fossil remains as those 

 mentioned above. The limestone above it is irregular, -mostly in boul- 

 ders or large slabs, as at Thompson's mines, and at the Shawneetown 

 Company's mines. 



In Hopkins county, Kentuky, No. 11 coal is opened at the Sisk 

 bank, and seen at some other places around in Town's property, With 

 the same shales and limestone. 



Arnold's mine, four aud a half miles south of Madisonville, Hopkins, 

 county. No. 11 coal is here eight feet thick, has two clay partings, 

 and a thick bed of black slabby shales, with an abundance of fossil re- 

 mains, fishes, and shells, which give character to this coal. The slabs 

 are covered with limestone. 



McNairy's coal, Pond river, Miihhnlurg county. No. 11 coal is 

 opened here at two places, seven feet thick. The clay parting, the 

 shales, with their characteristic fossils, and the limestone above them, 

 are found at each place. Here, also, coal No. 12 is present, and comes 

 so near No. 11, that it is separated from it only by its floor of two 

 feet six inches of fire clay, and by the limestone (one foot thick,) of 

 No. 11 coal. 



Miller s coal, on Isaac's creek, Muhlenburg county, belongs to No. 11. 

 It is six feet thick, has its usual black shales, with the before mention- 

 ed fossil remains, its superimposed limestone, and a clay parting. The 

 brown ferruginous and fossiliferous clay or shale is also present here, 

 covering the limestone. This ferruginous shale is sometimes above, 

 sometimes below the limestone, and sometimes takes its place. 



Airdrie, Muhlenburg county. Coal No. 11 is here the main coal, 

 six feet thick, with clay parting. The black shales contain an abun- 

 dance of beautifully preserved shells, and also scales, fins, and teeth of 

 fishes. They are covered with a limestone bed three feet thick. 



Bonharbouf', Daviess county, Kentucky. There is no place where No. 

 1 1 , coal is so easily identified by palseontological observations. The 

 <$qal about five feet thick, has an occasional day parting, or is sepaja- 



