McLEANSBORO GROUP 



79 



Samples of this coal bed that have been 

 examined are from the NW. J4 NW. |4 

 NE. 14 sec. 7, T. 6 S, R. 2 W., Perry 

 County, SW. l/J SW. 1/4 SE. l/ A sec. 33, 

 T. 1 S., R. 7 W., St. Clair County, and 

 NW. 1/4 SW. i/4 NW. 14 sec. 30, T. 9 S., 

 R. 5 E., Saline County. 



A section compiled by Cady 3 of the Perry 

 County exposure records the Jamestown 

 limestone as 1/2 inch thick, fossiliferous, 

 with a light gray soft shale above it. Be- 

 tween the limestone and the Jamestown 

 coal, there are eight inches of soft shale 

 which is carbonaceous toward the base. 

 The coal bed is six inches thick and is under- 

 lain by 48 inches of shale with a few lime- 

 stone concretions at the base. Below this 

 bed, there are 24 inches of limestone lenses 

 interbedded with shale, and the Herrin 

 limestone lies below. The sample from St. 

 Clair County is from the United Electric 

 Red Ray strip mine, sec. 33, T. 1 S., R. 

 7 W. The coal bed is three to four inches 

 thick with a lenticular pyrite parting \/i 

 inch from the top. Field notes by Cady 

 and Spotti record Yi inch of carbonaceous 

 shale above the coal bed and below the 

 Jamestown limestone which is one foot 

 thick. The Saline County samples are from 

 an Illinois Central Railroad cut along the 

 Edgewood-Vienna branch, sec. 30, T. 9 S., 

 R. 5 E. 



The spore content of the Jamestown coal 

 bed is apparently characterized by few 

 species, but eight genera have been identi- 

 fied, which suggests some diversity of floral 

 elements. The following genera and species 

 have been observed in the coal bed : 



1. Punctati-sporites fene stratus sp. nov. 



2. P. quaesitus sp. nov. 



3. P. sulcatus Wilson and Kosanke, 1944 



4. Granulati-s pontes sp. 



5. Laevigato-sforltes pseudothiessenii sp. 

 nov. 



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

 and B., 1944 



7. L. mtnutus (Ibrahim) S. W. and B., 1944 



8. Endosporites ornatus Wilson and Coe, 

 1940 



9. Triquitrites spinosus Kosanke, 1943 



10. Calamospora breviradiata sp. nov. 



11. C. hartung'iana Schopf, 1944 



12. Lycospora granulata sp. nov. 



13. L. punctata sp. nov. 



14. L. parva sp. nov. 



15. Raistrickia crinita sp. nov. 



3 Field Notes. 



A variation was noted in the abundance 

 of genera across the southern part of Illi- 

 nois from St. Clair County on the south- 

 western side to Saline County on the south- 

 eastern side. Punctati-sporites and Laevi- 

 gato-sporites are more abundant in Saline 

 County but Calamospora and Lycospora 

 are more abundant in St. Clair County. 

 Numerically, Lycospora is the most abun- 

 dant genus, averaging 33 to 36 percent of 

 the total spore population. L. granulata 

 sp. nov. is the most abundant species. 

 Laevigato-sporites is next in abundance and 

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

 and L. desmoinensis (Wilson and Coe) S. 

 W. and B., 1944, share approximately 20 

 to 23 percent of the 25 percent recorded 

 for the genus. L. pseudothiessenii sp. nov. 

 is rare, in contrast to the No. 6 coal bed, 

 the first coal bed below the Jamestown. 

 Punctati-sporites and Calamospora average 

 18 to 20 to 15 to 18 percent of the total 

 spore population respectively. The remain- 

 ing genera and species are minor elements 

 of the spore population numerically. 



Bankston Coal Bed 



The Bankston coal bed is exposed near 

 Bankston at the roadside east of the 

 Allensy crossing of the Illinois Central Rail- 

 road in the NE. \/ A NE. \/ A sec. 24, T. 9 S., 

 R. 4 E., Williamson County. The coal bed 

 lies several feet above the Bankston Fork 

 limestone, and is badly weathered. Spores 

 were extracted from the coal, but only after 

 several attempted macerations. The coal 

 had been oxidized by weathering so that 

 the acid oxidation phase of the maceration 

 process was unnecessary. 



The Bankston coal bed has been identi- 

 fied in several diamond-drill cores from 

 Franklin County. Samples of two cores 

 of this coal bed from Franklin were macer- 

 ated (maceration 536 E, from a drill-hole 

 in SE. 1/4 NW. i/J NE. \/ A sec. 16, T. 6 S., 

 R. 1 E., and maceration 537 F, from a drill- 

 hole in SE. 1/4 NW. i/4 SE. 14 sec. 27, T. 

 6 S., R. 2 E.). 



The following genera and species have 

 been identified from the Bankston coal bed 

 at the discovery locality and from the dia- 

 mond-drill holes mentioned above: 



