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The AAPG/Datapages Combined Publications Database
West Texas Geological Society
Abstract
The Eastern Shelf: Model of a Progradational Platform1
Abstract
The Eastern shelf of the Midland basin displays a physical stratigraphic fabric that is characteristic of constructional shelf platforms flanking many intracratonic basins. Outbuilding of the platform into the basin was accomplished by a succession of areally restricted deltaic and slope-fan depositional-episodes. Each episode consists of volumetrically dominant progradational facies (delta margin sand, prodelta mud, submarine fan sand and mud) capped and locally incised by aggradational facies (fluvial and distributary channel sand, delta plain and overbank mud). Each episode, in turn is composed of numerous depositionalevents, corresponding to emplacement of individual delta and fan lobes. In dip section, successive depositional-episodes are separated by thin inner shelf to massive shelf edge carbonate units deposited during destruction and transgression of proximal fan and delta systems. Carbonate units typically interfinger updip and along strike into temporally equivalent terrigenous facies.
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