The Pinnacles (Gulf of Mexico) The Pinnacles (Gulf of Mexico) The Pinnacles is a rocky prominence on the Continental Shelf approximately 300 feet deep and located about 70 miles off the coasts of Mississippi and Alabama which contains a wide-ranging reef formation. The Pinnacles reefs consist of a lush fauna of hard, soft and, black corals, fixed sea lilies and sponges. The reef creates a living habitat for a well-developed and diverse fish culture. Snappers and groupers spawn here. Typical Caribbean reef fishes and Carolinian shelf fishes, along with epipelagic fishes, and a few deep-sea fishes populate the reef. The Pinnacles reefs are currently too
Gulf of Mexico basin subsidence in the central region, as well as heavy sedimentation around the Florida Platform and Northern Gulf of Mexico. While a few intrusive igneous formations found as far south as Mexico City are dated to the Late-Jurassic or Early Cretaceous, the Gulf of Mexico during that time was relatively devoid of igneous activity. It wasn't until the Late Mesozoic that low-volume yet widespread volcanism occurred along the Western and Northwestern margins of the Gulf of Mexico, leaving the Yucatan Peninsula with an extremely alkali volcanic field in the subsurface. The volcanism is believed to have been activated along ancient plate