CARBONDALE GROUP 



71 



Depth Depth 



Ft. In. Ft. In. 



Coal bed No. 2 782 to 782 10 



Underclay and clay. . .782 10 to 786 9 

 Limestone (underclay 



limestone) 786 9 to 789 9 



Siltstone 789 9 to 791 Y 2 



Sandstone (corrected 



depth by marker). . .792 6 to 793 6 



Shale 793 6 to 810 



Siltstone 810 to 815 5 



Gray shale 815 8 to 818 



Black shale 818 to 818 8 



Top of Dekoven coal 



bed 818 8 



If the one-foot sandstone at 792 feet 6 

 inches represents the Palzo sandstone, the 

 total thickness of the Carbondale strata in 

 this drill hole is 231 feet. 



The following genera and species have 

 been identified from Fulton (maceration 

 603), Bureau (maceration 579), and 

 Grundy (maceration 580, 611) counties in 

 northern Illinois, and from Franklin Coun- 

 ty (maceration 536-G, 537-L) in southern 

 Illinois unless otherwise noted : 



1. Punctati-sporites obliquus sp. nov. 



2. P. verrucifer sp. nov.* 



3. P. fo-veatus sp. nov. 



4. P. quasiarcuatus sp. nov.** 



5. P. reticuloid.es sp. nov. 



6. Granulati-sporites convexus sp. nov. 



7. G. pallidus sp. nov. 



8. G. spinosus sp. nov. 



9. Alati-sporites hexalatus sp. nov.** 



10. A. trialatus sp. nov. 



11. Laevigato-sporites ovalis sp. nov. 



12. L. pseudothiessenii sp. nov. 



13. L. punctatus sp. nov. 



14. L. robustus sp. nov. 



15. L. desmoinensis (Wilson and Coe) S. W. 

 and B., 1944 



16. L. minimus (Wilson and Coe) S. W. and 

 B., 1944 



17. L. minutus (Ibrahim) S. W. and B., 1944 



18. Cirratriradites annuliformis sp. nov. 



19. C. annulatus sp. nov. 



20. Endosporites ornatus Wilson and Coe, 

 1940 



21. Triquitrites crassus sp. nov. 



22. T. inusitatus sp. nov. 



23. T. pidvinatus sp. nov. 



24. T. arculatus Wilson and Coe, 1940 



25. T. exiquus Wilson and Kosanke, 1944* 



26. Calamospora breviradiata sp. nov. 



27. C. flexilis sp. nov. 



28. C. hartungiana Schopf, 1944 



29. Lycospora bre-vijuga sp. nov. 



30. L. punctata sp. nov. 



31. L. granulata sp. nov. 



32. Raistrickia crinita sp. nov. 



33. R. crocea sp. nov. 



34. R. irregularis sp. nov. 



* Not observed in northern Illinois _No. 2 coal bed. 

 ** Not observed in southern Illinois No. 2 coal bed. 



35. R. pilosa sp. nov. 



36. R. rubida sp. nov. 



37. R. aculeolatus Wilson and Kosanke, 1944 



38. R. groyensis Schopf, 1944 



39. Florinites antiquus Schopf, 1944 



40. Sckopfites dimorphus sp. nov. 



41. S. colchester ensis sp. nov. 



42. Wilsonia sp. 



43. "Spherites" sp. 



The list of genera and species isolated 

 from the No. 2 coal bed indicates an abun- 

 dant and diversified flora. The publica- 

 tions of Noe, Janssen, and others describing 

 the plant compressions in the ironstone nod- 

 ules above the No. 2 coal bed in northern 

 Illinois likewise record an abundant and 

 diversified flora in post No. 2 time. 



Statistical counts of the small spores iso- 

 lated from the No. 2 coal bed show that 

 Lycospora and Laevigato-sporites are domi- 

 nant, and that Calamospora is next in 

 numerical importance. Thirty-eight to 42 

 percent of the total spore content is distrib- 

 uted between three species of Lycospora. 

 Twenty-seven to 33 percent of the total 

 spore content is distributed between seven 

 species of Laevigato-sporites , and 10 to 14 

 percent of the spore population is found in 

 three species of Calamospora. The other 

 10 genera and 28 species comprise the re- 

 maining 11 to 25 percent of the spore con- 

 tent. 



The diversified flora of No. 2 coal bed 

 apparently consisted largely of three groups 

 of plants represented by the three most 

 abundant genera of small spores. This is 

 probably true even though the spore output 

 per plant of the lycopsids is thought to be 

 rather high. The parent plant of Laevi- 

 gato-sporites is unknown but it is reasonable 

 to expect fructifications bearing spores of 

 this type to be present in the ironstone con- 

 cretions from the Francis Creek shale which 

 lies above the No. 2 coal bed in northern 

 Illinois. 



Three samples were generally taken (top, 

 middle, and bottom) from each collection 

 of No. 2 coal bed, regardless of the thick- 

 ness. 



As stated, the No. 2 coal bed in western, 

 northern, and southern Illinois has a similar 

 spore content. It has also been noted that 

 the thin No. 2 coal bed from southern Illi- 

 nois contains essentially the same floral ele- 



