80 



ILLINOIS STATE GEOLOGICAL SURVEY 



Although Triletes praetextus was found 

 in only one sample of the Battery Rock 

 Coal (maceration 587) from Illinois, the 

 species also was represented in the shale 

 (maceration 163) above the Pinnick Coal of 

 Indiana. 



The following genera and species were 

 identified from a sample of the Pinnick 

 Coal (maceration 150) obtained from the 

 Pinnick Quarry, Orange County, Indiana: 

 Triletes auritus (A) 



T. globosus var. (B) (P) 



Cystosporites giganteus (P) 



T. superbus ^ (R) 



Assuming that typical spores of Triletes 

 globosus, such as those occurring in two of 

 the samples (macerations 629 and 733) re- 

 ferred to the Battery Rock above, are from 

 slightly younger coals, the abundant occur- 

 rence of spores of T. auritis in the Pinnick 

 Coal marks the lowest known occurrence of 

 this species in the Eastern Interior Coal 

 Basin. T. superbus also is represented for 

 the first time in the Pinnick Coal. 



The shale (maceration 163) above the 

 Pinnick Coal, from the old Braxton Quarry, 

 Orange County, Indiana, contained the fol- 

 lowing genera and species: 



Triletes globosus var. (B) (A) 



T. superbus (C) 



T. subpilosus (C) 



T. praetextus (C) 



T. mamillarius (P) 



T. rotatus (P) 



T. ramosus (P) 



Cystosporites giganteus (R) 



Spencerisporites cf. S. radiatus (R) 



Monoletes (R) 



Spores of Triletes globosus var. (B) con- 

 stituted about 90 percent of the assemblage. 

 T. rotatus and T. ramosus are represented 

 for the first time. All the species recognized 

 in the Battery Rock Coal (maceration 587) 

 also are represented in this shale. 



"Makanda" Coal 



The Makanda Sandstone was originally 

 defined as extending from the top of the 

 Drury Shale to the base of the Murphys- 

 boro Coal. The term "Makanda" is used 

 here in its restricted sense (Wanless, 1956) 

 as the lower member exposed in Giant City 

 State Park near Makanda, Jackson County, 

 Illinois. The samples of "Makanda" coals 



(macerations 142, 905, 906, and 907) ex- 

 amined for this report probably include 

 the coal mentioned by Lamar (1925, p. 97) 

 as a 2-foot coal occurring in the SW14 SW14 

 sec. 28, T. 10 S., R. 1 W., in southern Jack- 

 son County. 



Three samples were taken from around 

 a small coal digging (NE14 SW14 SW14 

 sec. 28, T. 10 S., R. 1 W.) in the Makanda 

 Sandstone. The main coal was covered, but 

 one sample of coal (maceration 905) found 

 in the dump pile contained spores of the 

 following genera and species: 



Triletes horridus (A) 



T. auritus (A) 



Spencerisporites cf. 5. radiatus (P) 



Cystosporites giganteus (R) 



C. verrucosus (R) 



Monoletes (R) 



About equal numbers of spores of T. auri- 

 tus and T. horridus constituted 90 percent 

 of the large spore assemblage. This is the 

 first representation of C. verrucosus in the 

 Pennsylvanian of Illinois. 



The following genera and species were 

 identified from a sample (maceration 906) 

 of four one-inch coal stringers above the 

 main coal in the western digging: 



Triletes globosus (A) 



T. horridus (C) 



T. auritus (C) 



T. superbus (C) 



T. glabratus (P) 



Spencerisporites cf. S. radiatus (P) 



T. triangulatus (R) 



Cystosporites giganteus (R) 



C. varius (R) 



Monoletes (R) 



Triletes globosus comprises 35 percent of 

 the total large spore content and T. auritus, 

 T. horridus, and T. superbus, each com- 

 prise 20 percent of the total large spore con- 

 tent. This is the first representation of both 

 T. glabratus and Cystosporites varius in the 

 Pennsylvanian of Illinois. 



The following genera and species were 

 identified from the third sample (macera- 

 tion 907) of coal taken from coal stringers 

 above the eastern digging in the Makanda 

 Sandstone: 



Triletes globosus (A) 



Cystosporites varius (A) 



T. auritus (C) 



T. glabratus (R) 



T. horridus (R) 



