Oriskany Formation, Appalachian Basin (07)

Western Pennsylvania, Eastern Ohio, and Eastern Kentucky

Comments on Geologic Parameters

07 Top Seal Thickness:

The Oriskany Sandstone is overlain by a cherty Onadaga Limestone and/or the Needmore Shale (Oliver and others, 1967; Milici, 1996). This interval is somewhat effective as a top seal, but it may be permeable in areas because of fracturing. However, the Onadaga Limestone/Needmore Shale interval is overlain by a thick section of Middle Devonian black shale, which makes an excellent regional confining layer. For the GIS, we gridded the map of Oliver and others (1967; their fig. 8), which shows the thickness distribution of the Middle Devonian black-shale interval (c7oriskany).

07 Map:

map

07 Reference:

Milici, R. C., 1996, Stratigraphic history of the Appalachian Basin, in Roen, J. B., and Walker, B. J., eds., The atlas of major Appalachian gas plays: West Virginia Geological and Economic Survey Publication V-25, p. 4–7.

Oliver, W. A., DeWitt, W., Jr., Dennison, J. M., Hoskins, D. M., and Huddle, J. W., 1967, The Appalachian Basin, United States, in Oswald, D. H., ed., International Symposium on the Devonian System: Calgary, Canada, Alberta Society of Petroleum Geologists, p. 1001–1040.

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