Petrographic and Geochronologic Provenance Analysis of Upper Pennsylvanian Fluvial Sandstones of the Conemaugh and Monongahela Groups, Athens County, Ohio
The petrography and U-Pb probability ages of detrital zircons from four channel sandstones representing all three fluvial styles within the Conemaugh and Monongahela Groups were compared to determine if changes in composition and age of the framework grains and heavy minerals were a function of fluvial style, climate, or provenance. The results show that the petrographic differences between the samples are best explained by variations in grain size and provenance. Assimilation of zircon age probability data for the Late Paleozoic of the Appalachian basin shows the presence of at least two sub-basins present throughout deposition of the Pottsville Group (Early Pennsylvanian) to the Dunkard Group (Early Permian?). The southern boundary of the northern sub-basin, which includes this study area, is near the margin of the Pennsylvanian structural salient, which suggests the boundary was likely influenced by irregularities formed during the rifting of Rodinia.
School Location:USA - Ohio
Source Type:Master's Thesis
Keywords:pennsylvanian conemaugh monongahela detrital zircon geochronology
Date of Publication:01/01/2008