92 GEOLOGY OF ILLINOIS. 



of good ore could be obtained from a vertical thickness of four or five 

 feet of shale. The thin coal at Spiker's place overlays this shale, and 

 the beds exposed there gave the following section : 



Ft. In. 



Bituminous shale 4 



Hard blue limestone (septaria) - 6 inches to 1 . G 



Bine shale 1 ft. to 1 6 



Coal 6 



Fire-clay and clay shale 1 



A few well preserved fossils were found in the septaria over the coal, 

 among which were Nautilus occidentalus, Macrocheilus inhabilis, Productus 

 pertenuis, Sjnrifer cameratus, Myalina sub quadrata, Ghonetes, joints of 

 Crinoidea, etc. All the beds exposed from Hoag's quarry to this point 

 are probably above those passed through at the Xenia bore. 



At Mr. John Lamkins' place about two miles north-west of Louisville, 

 on the ET. W. qr. of sec. 20, T. 4, E. 6, there is an outcrop of gray lime- 

 stone underlaid by a coal seam which ranges from twelve to eighteen 

 inches in thickness, and is worked by Mr. Lamkins in a limited way, 

 affording a coal of fair quality. The limestone over the coal is a 

 compact, hard, gray rock, ranging from three to four feet in thickness, 

 containing numerous fossils that may be obtained from the calcareous 

 shaly layers associated with the limestone, in a fair state of preservation, 

 The section here is as follows : 



Ft. In. 



Buff shale "with iron hands 5 to 8 



Compact gray limestone 3 to 4 



Calcareous shale 2 to 3 



Coal lto 1 6 



Clay shale or fire-clay 1 to 2 



Sandy shales ? 



The fossils observed here include the following species : Orthis car- 

 bonaria, Fusulina cylindrica, Sjpirifer cameratus, Spiriferina Kentuclcensis, 

 Lopliophyllum proliferum, Productus longisjnnus, P. costatus, and P.punc- 

 tatus. 



On sec. 10, T. 4, E. 5, this limestone is found on Crooked creek but 

 little above the creek bed, and the coal if found here at all would be 

 below the water level. 



On the S. W. qr. of sec. 25, T. 5, E. 5, about two miles east of Lark- 

 insville, the coal and the overlaying limestone outcrop in the bluffs of 

 Dismal creek. The limestone is here from four to five feet in thickness, 

 and the coal is reported to be about the same as at Lamkius' place. 

 There is here from ten to twelve feet of sandy shale exposed in the 

 bluffs of the creek below the coal. 



On sec. 16, T. 4, E. 5, near the north-west corner of the section, a bed 

 of hard shaly sandstone outcrops in the banks of a small branch, over- 

 laid by a slaty bituminous shale a foot or more in thi'ckuess, containing 

 lenticular masses of black limestone or septaria. The shaly sandstone 



