142 GEOLOGY OF ILLINOIS. 



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3. Clay shalos. 8 



4. Thinly laminated clay shales with plants 1 



5. Clay shales in thin layers iu the creek ; beneath there is said to be a thin seam of coal ? 



An interesting group of rocks occurs on Ramsey creek, comparatively 

 isolated from any other group in tins county, no other outcrop beiug 

 observed within six miles, but from the topography of the country it is 

 apparent that their position is below that of the rocks previously 

 mentioned. Their position is near No. 22 of section on page 128. 



Section at the railroad on Ranisev creek and just below : 



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1. Sandstone and sandy shale 21 



2. Clay shales with compact nodules of iron ore 7 



3. Semi-bituminous dark slate 2 



4. Indnrated clay shale, a few inches ? 



5. Even bed of iron stone, outside brown, fracture purplish-drab, abounds in Estlteria, al60 



contains A viculopecten - 2 



6. Light-blue argillaceous shale 4 



7. Drab-colored clay shales or fire-clay 4 



8. Drab clay shales, nodules in the upper part, lower part talus of above, about 15 



9. An ^ to a J mile down the creek we have an ash-blue limestone, upper part turns brown and 



shells off on exposure 3 



The lower part is sometimes shelly ; abounds in Syntrilasma liemi- 

 plicata, also contains Meehella striato-costata, Chonetes, Spirifer cameratus, 

 Sp. lineatus, Spiriferina Kentuekensis, Athyris subtilita, Terebratula bovi- 

 dens, Hemiproniies crassus, Productus longispinus, P. costatus, Nautilus, 

 Stenopora lepidodendroides, Polypora, Synocladia, and Lophophyllum pro- 

 liferum; it has also dark fucoidal veins passing irregularly through it. 



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10. Clay 1 



11. Coarse gray limestone, contains only a few crinoid stems and a few remains of fish teeth 2 6 



12. Yellow clay and nodules of limestone ? 



About two miles down the creek there is an outcrop on the hillside 

 of about two feet of even bedded chocolate colored and yellowish sand- 

 stone, with twenty-five feet of sandy shale beneath, and towards the 

 foot of the bluff, two inches of blue, compact limestone with a pot metal 

 ring ; this is probably near No. 4 of above section. One and a half 

 miles further down the creek, at a ford, the following appears: 



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1. Drift of sand and clay ? 



2. Sandy shales 4 



3. Yellow, ochre colored sandstone 2 



4. Gray shales with ironstone concretions abounding in some very nice fossils, including Leda 



Grata, Solenomya radmta, Atyalina, resembling M. meliniformis, Schizodus near S. Rossicus 

 Allorisma, Aviculopecten and Edviondia: 5 



No. 4 of this section is near No. 5 of the section at the railroad bridge. 

 The course of Eamsey creek is generally south-east. From the above 

 it will be seen that the rocks have a slight dip down stream. 



On Beck's creek at the mill, in sec. 10, T. 8 N., R. 2 E., there appears 

 6 feet of buff limestone abounding in Syntrilasma hemiplicata, and Lopho- 

 phyllum proliferum, also contains Athyris subtilita, Productus costatus 



