CHRISTIAN COUNTY. 161 



The next iu descending order is 12 feet of sandstone (No. 26), seen on 

 South Fork, five miles below Tavlorville. Tlie upper part is shaly, 

 the lower beds thick, hard and gray, and a softer brown with dark 

 specks ; contaius remains of Calamites, Sigillaria, and other coal plants. 



Nbs. 27, 2S and 29.— In sec. 29, T. 14 N, R. 3 W., a quarter of a mile 

 above Greenwood's mill, I observed at the top — 



Ft. In. 



F.eA shales 1 



Dark olive calcareous shales, containing Athyris subtilita. a small Macrocheilus, Nucula vcntri- 



C08a, anA crinoiA stems 2A 



Coal, No. 12 10 



Slope to limestone No. 30 of general section 3 



Three miles above Ealston's bridge, on the South Fork of the San- 

 gamon, observed Nos. 30 and 31, as follows : 



Ft. In. 



1. Ash-gray, compact limestone, showing facets of calc-spar, very few fossils 8 



2. Shales, with noAnles of buff limestone abounAing in fossils, Productus costatus, Productus 



longispinus, Spirifer cameratus, Spiri/erina Kentuckensis. Athyris subtilita, Chonetes 

 variolata ? Crinoid stems, Fistulipora anA Synocladia biserialis 3 



At Ealston's quarry, in sec. 3, T. 13 N., R. 3 W., we have — 



Feet. 



1. Slope from top of hill 20 



2. Gray limestone, fossils are Productus costatus, P. punctatus, Spirifer cameratus, Spiriferin 



Kentuckensis, Uemipronites erassus 1 



3. Like the last, but more shelly, fossils about the same 1 



4. Green shales 1 



5. Brown shales, with noAnles of limestone ; abonnAs in Athyris subtilita, Crinoid stems anA 



plates, Lophophyllum proliferuni, Sp. cameratus 1 



6. Gray or Arab limestone, but few fossils ; those seen were Athyris subtilita, Productus longi- 



spinus, P. Prattenianus anA Lophopyllum proliferuni o 



Part of the same at Greenwood's mills, as follows : 



Ft. 



1. Clay anA sanAy alluvium 1 



2. Clay, with noAnles of brown limestone, containing Chcetetes, Fistulipora, Athyris subtilita, 



Productus Nebrascensis, P. costatus, P Prattenianus, P. punctatus 2 



3. Gray or brown anA buff limestone ; contains Productus longispinus, P. Prattcnnianus, P. puna- 



tatus, P. costatus, P. Nebrascensis, Sp. cameratus, Memipronites erassus,. Athyris subtilita 

 anA Lophophyllum proliferum 12 



4. Bituminous shale (No. 32) in sight 2 



At North Fork mills, on the North Sangamon river, in sec. 13, T. 15 

 N., R. 3 W., we have— 



Ft. 



1. Slope, clay anA sanA— Arift 50 



2. Limestone, upper part gray anA noAular, lower part more firmly beAAeA, soon weathers 



brown ; fossils-: Productus longispinus. P. costatus, P. Prattenianus, P. Nebrascensis, 

 Athyris subtilita, Spirifer cameratus, Memipronites erassus g 



3. Clay shales, contains a Crinoid allieA to Poteriocrinus hemisphericus 2£ 



4. Limestone weathering brown 4 



Three miles down stream, near the west county line, the lower part 

 of the last section appears 7 feet thick, with brown shaly partings be- 

 tween the beds, which abound in Athyris subtilita; the other fossils are 

 P. costatus, P. Nebrascensis, P. Prattenianus and Lophophyllum pro- 

 liferum. 



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