Palynological Correlation of Atokan and Lower Desmoinesian (Pennsylvanian) Strata Between the Illinois Basin and the Forest City Basin in Eastern Kansas

Palynological correlation is made between Atokan and lower Desmoinesian strata in the Illinois basin and the Forest City basin in eastern Kansas. Spore data from previous studies of coals in the Illinois basin and other coal basins are compared with data from spore assemblages in coal and carbonaceous shale bands in a core drilled in Leavenworth County, Kansas. Correlations are based on first and/or last occurrences of 31 species common to the Illinois basin and eastern Kansas and on significant increases or decreases in abundance of several of those taxa. The oldest coal, which is 26 ft (8 m) above the top of the Mississippian, is early Atokan (early Westphalian B) in age and is approximately equivalent to the Bell coal bed in the Illinois basin. The Riverton coal bed at the top of the studied interval in Kansas is early Desmoinesian (early Westphalian D) and correlates with about the Lewisport coal bed in the Illinois basin. Three coal beds near the base of the Pennsylvanian in three cores drilled in Cherokee County, Kansas, which were also studied, range in age from late Atokan to early Desmoinesian. As in other coal basins, Lycospora, borne by lycopod trees, greatly dominates the lower and middle Atokan spore assemblages in coals and shale, but spores from ferns, especially tree ferns, significantly increase in abundance in the upper Atokan and lower Desmoinesian. The pattern of change of dominance among Lycospora pellucida, L. granulata, and L. micropapillata in middle Atokan (Westphalian B-C transition) that has been demonstrated earlier in the Illinois basin and eastern Kentucky and Tennessee, also occurs in eastern Kansas. At least 10 species of spores, which appeared in the middle Atokan in other parts of the equatorial coal belt, also appeared at this time in eastern Kansas. Most of these species have their affinities with the ferns, which were adapted to drier habitats than lycopods. Thus, the climate may have become a little drier in the equatorial coal belt during middle Atokan

Geologic notes

Ope

Correlation and palynology of coals in the Carbondale and Spoon formations (Pennsylvanian) of the northeastern part of the Illinois Basin

Bibliography: p. 139-144

Spores in strata of late Pennsylvanian cyclothems in the Illinois Basin

Includes bibliographical references (p. 70-71).Introduction -- Previous investigations -- Preparation techniques -- Description of small spores -- Description of large spores and megaspores -- Description of other microfossils -- Distribution of small spore genera -- Conclusions -- Description of geologic sections

Spores in strata of late Pennsylvanian cyclothems in the Illinois Basin /

Illinois State Geological Survey Bulletin No. 9

Palynology and petrography of a Middle Devonian coal in Illinois /

Information circular / Illinois State Geological

Development of paleobotany in the Illinois Basin

Information circular / Illinois State Geological

Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian)

Information circular / Illinois State Geological

Geologic notes

Ope

Geology of the Eddyville, Stonefort, and Creal Springs Quadrangles, southern Illinois

One map in pocket.Includes bibliographical references (p.81-85)