53 



percent), and Densosporites (1.3 percent) 

 remained at about the same percentage as in 

 maceration 1175-E. 



Punctatis pontes (52 percent) was by far 

 the dominant genus farther up in the under- 

 clay (maceration 1175-G). Calamospora de- 

 creased to 18.3 percent, and Granulatis pontes 

 increased to its maximum for the cyclothem, 

 13.3 percent. A conspicuous change took 

 place in the population of Endosporites and 

 Lycospora — they declined to less than 1 per- 

 cent each. Laevigatosporites (10 percent) 

 and Florinites (3.3 percent) were important 

 constituents of the spore population. Tri- 

 quitrites, Crassispora, Densosporites, Rein- 

 schospora, Indospora, Trivolites, and Illinites 

 each made up 1 percent or less of the total 

 spore population. 



In maceration 1175-H from the top of the 

 underclay, Punctatis pontes (38.7 percent) 

 was followed in abundance by Florinites, 

 which showed a marked increase to 34.3 

 percent. Laevigatosporites again composed 

 10 percent of the spore assemblage. Calamo- 

 spora and Granulatis pontes diminished in 

 relative abundance to 4.7 percent and 8.7 

 percent, respectively. Minor constituents in 

 the spore population included Triquitrites, 

 Gravis pontes, Crassispora, Wilsonites, Endo- 

 sporites, and Lycospora. 



In the shaly coal (maceration 1175-1), 

 Punctatis pontes (39.3 percent) remained at 

 about the same level of abundance as in the 

 underclay. Laevigatosporites increased con- 

 siderably and reached its maximum for the 

 section at 22.7 percent. Florinites (18 per- 

 cent) began a decline that continued through 

 the coal into the immediately overlying shale. 

 Calamospora (8.7 percent) increased slightly 

 in frequency, whereas Granulatis pontes (4.3 

 percent) decreased slightly. Triquitrites (3 

 percent) and Vesicaspora (3.7 percent) were 

 not uncommon. Raistrickia, Ahrensis pontes, 

 Reinschospora, Reticulatis pontes, Convoluti- 

 spora, Gravisporites, Crassispora, Endospo- 

 rites, and Wilsonites together totaled less than 

 1 percent. 



In the coal (maceration 1175-J), Puncta- 

 tisporites (39.6 percent) was followed in 

 abundance by Calamospora at 17.4 percent, 

 its secondary peak for the sequence, and by 

 Florinites (12.6 percent) and Laevigatospo- 



rites (12.6 percent). Vesicaspora and Gran- 

 ulatisporites were next in relative abundance 

 with 9.2 percent and 6 percent, respectively. 

 Triquitrites, Raistrickia, Endosporites, and 

 Indospora were rare. 



Punctatis pontes (74 percent) reached its 

 maximum abundance for the cyclothem in the 

 gray siltstone (maceration 1175-K) imme- 

 diately above the coal. Calamospora (10.7 

 percent) and Florinites (5.3 percent) de- 

 creased. The relative abundance of Granula- 

 tisporites (6 percent), Endosporites (1.7 per- 

 cent), Triquitrites (1.3 percent), and Laevi- 

 gatosporites (<1 percent) showed little 

 change. Lycospora, Reticulatis pontes, and 

 Secarisporites each made up less than 1 per- 

 cent of the spore population. 



In the overlying dark gray shale sequence, 

 Florinites increased to 64.7 percent and be- 

 came the dominant genus in maceration 

 1175-L. Punctatis pontes (33.3 percent), Ca- 

 lamospora ( < 1 percent) , and Granulatispo- 

 rites ( < 1 percent) were considerably less 

 abundant than in the underlying shale. En- 

 dosporites, Gravisporites, Crassispora, and 

 Pityosporites were rare. 



The spore distribution in the overlying 

 dark gray to black fossiliferous shale sam- 

 ples (macerations 1175-M and N) was not 

 greatly different from that in maceration 

 1175-L. Punctatis pontes (25.7 percent) de- 

 creased slightly in maceration 1175-M, and 

 Florinites (56 percent) decreased slightly in 

 maceration 1175-N. Illinites increased from 

 3.3 percent in maceration 1175-M to 6.3 

 percent in maceration 1175-N, where it 

 reached its maximum occurrence. Granu- 

 latisporites, Calamospora, and Endosporites 

 showed some minor fluctuations in frequency. 

 Pityosporites accounted for 3 percent of the 

 spore population in maceration 1175-M. 



In the shaly limestone (maceration 1175- 

 O), Punctatis porites suddenly increased to 

 61.3 percent, more than double its total in the 

 underlying shale sample. Florinites (16.3 

 percent) showed a correspondingly sharp de- 

 crease in abundance. Granulatis porites and 

 Endosporites increased slightly to 6 percent 

 and 5.7 percent, respectively. Wilsonites 

 (4.0 percent), Triquitrites (2.7 percent), 

 Crassispora (1.3 percent), Illinites (1.0 per- 

 cent), Gravisporites (<1 percent), Calamo- 

 spora ( < 1 percent) , and Pityosporites ( < 1 



