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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Directional Properties, Paleoslope, and Source of the Sylvania Sandstone (Middle Devonian) of Southeastern Michigan and Northwestern Ohio
Craig B. Hatfield, Timothy J. Rohrbacher, Jack C. Floyd
ABSTRACT
Measurement of maximum inclination azimuths of 202 cross-bed sets at 7 exposures of Sylvania Sandstone in southeastern Michigan and northwestern Ohio revealed preferred inclination of cross-bedding down the northwestward regional dip, in the direction of maximum thickness increase of the formation, and in the direction of decreasing stratigraphic hiatus of the unconformity at the base of the formation.
Preferred orientation of long dimensions of Sylvania sand grains is parallel to the azimuth of inclination of the cross-bed set containing them.
Although primary sedimentary structures, sand fabric, and stratigraphic and structural relationships superficially suggest a source in the direction of the Findlay Arch to the southeast, the sand probably came from Wisconsin.
Because of the relation of permeability to sand fabric, perhaps the relation of sand fabric to cross-bed orientation, regional dip, and direction of maximum formation thickening, as reported here for the Sylvania Sandstone, could be of value in reservoir evaluation.
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