-36- 



1. Shale - dark gray to black, calcareous; contains numerous pelecypods. 



2. Limestone - gray; contains numerous thin-shelled pelecypods. 



3. Coal - bright, discontinuous. 



4. Clay - light gray to dark gray; contains small limestone nodules. 



5. Shale - greenish gray, calcareous, poorly bedded above, well bedded below; 

 contains limestone concretions; very sandy in lower part. 



6. Limestone - reddish, dense, nodular, poorly bedded, fossilif erous. 



7. Shale - light bluish gray; contains greenish gray limestone concretions. 



8. Shale - greenish gray, calcareous, micaceous, slightly fossilif erous; 

 contains lens-like masses of calcareous sandstone. 



9. Limestone - bluish gray to gray, crystalline, fossilif erous, nodular; 

 weathers rusty brown. 



10. Shale - greenish gray, calcareous, micaceous; contains ironstone con- 

 cretions. 



11. Limestone - greenish, brownish, and dark gray, crinoidal and fossilif erous, 



12. Shale - greenish gray to dark gray, fossilif erous; contains limestone 

 nodules. 



13. Shale - dark gray; contains limestone concretions. 



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LU 



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unnamed coal 



MACOUPIN LS. MEMBER 



5 FT. 



WOMAC COAL MEMBER 



14. Shale - black, hard, laminated; 

 contains conodont natural assem- 

 blages; lower inch dark gray and 

 fossilif erous. 



15. Coal - thin-bedded. 



16. Clay - bluish to greenish gray, 

 starchy, slightly sandy in places; 

 contains calcareous nodules. 



Fig. 18 - RHODES' (1952) LOCALITY 2, ravine 100 feet east of Illinois Route 4. 

 SWl$ SE% Sec. 34, T. 10 N., R. 7 W. or ravine 100 feet east of old 

 Illinois Route 4 (see Carlinville Quadrangle), NW% NE% NW% Sec. 2, 

 T. 9 N., R. 7 W., Macoupin County, Carlinville Quadrangle. Rhodes' 

 natural assemblages were collected from the black shale above the 

 Womac Coal Member of the Modesto Formation. (Stratigraphic section 

 after Kosanke et al., 1970). 



