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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 36 (1952)

Issue: 5. (May)

First Page: 965

Last Page: 965

Title: Stratigraphic Traps on the South Edge of the Williston Basin: ABSTRACT

Author(s): John Paul Gries

Article Type: Meeting abstract


The entire Ordovician, Silurian, Devonian, and upper Mississippian sections pinch out around the southern margin of the Williston basin. On the southeastern edge, the Pennsylvanian, Permian and Triassic also pinch out beneath the pre-Sundance unconformity.

Upper Cretaceous sands, whose source is to the east, pinch out on the west flank of the basin.

Variations in quality, quantity and artesian pressure within the Pahasapa, Minnelusa, and Sundance formations also suggest Previous HiteffectiveTop barriers to circulation of fluids within these formations.

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Copyright 1997 American Association of Petroleum Geologists