Hypothetical views of the Delaware basin and surrounding platform areas during sea-level low- and
highstands. Lowstand intervals were periods of terrigenous sand transport across shelves, mainly by
eolian processes, and sand deposition occurred mainly in the basin. Highstand intervals saw develop-
ment of shelf-margin reefs with associated back reef carbonate-evaporite-redbed deposits and thick
carbonate fore-reef talus deposits. Basins of this time had only thin calcareous shale deposition.

© Peter A. Scholle, 1999

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