Paper No. 72
Presentation Time: 2:45 AM


SCARESHAWK, Kelsey1, ANDERSON FOLNAGY, Heidi2, BACCI, D.C.3, ROCHA-CAMPOS, A.C.3 and COTTER, James F.P.4, (1)Geology Discipline, University of Minnesota, Morris, Morris, MN 56267, (2)University of Montana Western, Dillon, MT 59725, (3)Instituto des Geosciências, Universidade de São Paulo, Sao Paulo, 05450-001, Brazil, (4)Geology Discipline, University of Minnesota, Morris, 600 East 4th Street, Morris, MN 56267,

The Carboniferous Itararè Subgroup exposed in and around Parana State, Brazil is a glacially derived sedimentary sequence containing numerous glaciogenic sedimentary facies. Roadwork in the town of Witmarsum revealed multiple exposures of massive and laminated clays within the Itararè. This is the first time these clay units have been recognized in the area.

The objective of this project is to determine the depositional environment and origin of the clay units. Additionally, analysis will determine if this is a single unit or multiple facies within the Itararè. In the field, clay units were described and stratigraphic sections were measured. In the laboratory, chemical analysis using XRD and pollen analysis will determine the age and depositional environment (marine or lacustrine conditions). Results will aid in the reconstruction of glacial conditions and determination of the number of glacial advances and retreats in the Witmarsum area.

Research for this study was funded by a grant from the N.S.F.-R.E.U Program (NSF-EAR-1262945).