Abstract

The stratigraphy of the middle Hoxbar (Pennsylvanian) in the northeastern shelf and deep basin of the Anadarko basin of Oklahoma reflects a cycle of deposition consisting of a regression, transgression and regression. The initial regression is represented by the progradation of the lower Medrano Delta into the Anadarko basin. Sand was deposited in channels on the platform and in a large bar adjacent to the delta slope. The transgression which followed capped the platform with the Belle City Limestone. The delta shifted to the north and continued to supply coarse clastic sediment to the basin. These coarse clastics were deposited in a bar located en echelon to the lower Medrano bar. The progradation of the lower Wade sediments represents a regressionary phase. The influx of clastics destroyed the carbonate-secreting organisms that constructed the Belle City carbonate bank and began to fill the basin. Sand deposition in the lower Wade occurred adjacent to the Belle City carbonate bank.