Where Change Goes to Work. FrontPage. Philadelphia Distributor. Delaware Basin. Exposed and buried parts of Capitan Reef.
Blue area shows area once flooded by the Delaware Sea. Geology[edit] By earliest Permian time, during the Wolfcampian Epoch, the ovoid shaped subsiding Delaware Basin extended over 10,000 square miles (26,000 km²) in what is now western Texas.[1]:193§1 This period of deposition left a thickness of 1600 to 2200 feet (490 to 670 m) of limestone interbedded with dark-colored shale.[1]:193§1 A narrow outlet that geologists call the Hovey Channel periodically supplied new seawater from the Panthalassa Ocean to the west.