Alan S. Horowitz

Conodont paleontology of the Providence Limestone Member of the Dugger Formation (Pennsylvanian, Desmoinesian) in the southern part of the Illinois Basin

ABsTRAcr-The Providence Limestone member of the Dugger Formation in Indiana and its lithologic correlatives in the southern part of the Illinois Basin are thin lime mudstones to packstones lying stratigraphically between the Herrin and Hymera Coal Members of the Dugger Formation and their equivalents. The purposes of the study are to describe and correlate the Providence conodont fauna and to apply biofacies analysis and petrographic study to interpreting the paleoenvironments. Providence conodonts are dominated by representatives of the Idiognathodus-Streptognathodus plexus. Hindeodus is abundant; Neognathodus is common; and Idioprioniodus, Adetognathus, and Diplognathodus are common only in some sections. Aethotaxis is a minor constituent.

THE MAZON CREEK FLORA: REVIEW OF RESEARCH AND BIBLIOGRAPHY

ABSTRACT The Pennsylvanian Mazon Creek Flora is as diverse as any of similar age in North America. Plants from the Mazon Creek nodules have been assigned to over four hundred specific and one hundred and thirty generic names. The Mazon Creek Flora is of Allegheny Age and is contained within the Desmoinesian Series of the North American midcontinental marine succession and the Westphalian D of the European succession.