140 GEOLOGY OF ILLINOIS. 



Ft. Iu. 

 No. 8. One and a half miles down stream there is exposed 25 feet of clay shales, they may 



he as much as 50 or 75 feet in thickness. Men boring at Odell's report 80 feet 



below No. 3 (coal No. 15) "without reaching any coal. In the road near the creek 



at Slabtown the following beds were seen : 

 No. 9. Dark grayish-blue sha'y limestone, sometimes in solid layers suitable for building 



purposes, contains remains of fossils 8 



No. 10. A few inches of shale % 



No. 11. Coal — smut in the road — in a "well. 1 



No. 11 J. Fire-clay covered by debris at this place 4 



No. 12. Ochrey-brown sandy shales with nodules of ironstone and some hard rough masses 



of sandstone 25 



Below this there may be 25 to 50 feet more of sandy shales, to the 

 next lowest rock seen at Bichardson's coal bank, in sec. 27, T. 6 1ST., R. 



2E. 



Ft. In. 



No. 14. Yellow clay shales 6 



No. 15. Dark gray shelly limestone passing into a calcareous shale, very fossiliferous ; 

 contains Hemipronites crassus, Ohonetes Flemingii, Spiri/er cameratus, Productus 

 Nebrasoensis, Aviculopecten occidentalism Myalina ampla, Myalina Swallovii, Leda 

 arata, Monopteria gibbosa, Schizodics, Maerodon, Edmondia, PhitUpsia Sangamoensis, 

 Poteriocrinus ? near P. hemisphericus, stems of Crinoids, Synocladia bUerialis and 



Fistulipora - 4 



No. 1 fi. A few l'eet of clay shale and. a few inches of dark shale 



No. 17. Covered by debris. — Bituminous coal (13) said to be 16 



Below the forks of Hickory creek there is exposed 8 feet of thin 

 bedded sandstone. On the South fork of Hickory, part of the above 

 section appears thus: 



Ft, In. 



1 . Bitum hi ous sh ale ? 



2. Dark blue shaly limestone 6 



3. Bitumi nous coal (coal No. 14) 10 



4. Olive clay shale 2 



5. Nodular arenaceous limestone, contains Productus' Prattenianus, Allorisma and a large 



PUurotomaria 2 



6. Dark red and olive day shales with nodules and concretions of ironstone 4 



A quarter of a mile down the creek there is about 40 feet of hard 

 sandstone and sandy shales. 



On Eock creek -and Wolf creek coal IsTo. 15 (Shelby coal) with the 

 adjacent rocks is found. At Phifer's and at Joel Blakely's the section 

 is as follows : 



Ft. In. 



1. Yellow and brown sandstone, containing remains of plants, with a few red ochrey bands at 



the lower part 35 



2. Soft black shales., ; 1 



3. Coal (15) 18 



4. Clay with some nodules of limestone 4 



5. Rough looking fine-grained buff limestone, no fossils except a few Crinoid stems 4 



6. Sandy shale 8 



Below the forks of Moccasin there is exposed 25 feet of shales, the 

 upper 5 feet sandy, below dark bluish-olive clay shale. At 12 feet from 

 the bottom there is a 5 inch calcareous stratum, abounding in Myalina 

 sub-quadrata, also contains Leda arata^ Schizodus, Lingula, Macrodon, 

 (large Sp.), and fragments of crinoids. This bed is probably 30 or 40 

 feet below coal No. 15. 



