Castle Harbour, Bermuda St. David'd Island and Cooper's Island. Castle Harbour, Bermuda Castle Harbour is a large natural harbour in Bermuda. It is located between the northeastern end of the main island and St. David's Island. Originally called "Southampton Port", it was renamed as a result of its heavy fortification in the early decades of the Seventeenth century. A gem of Bermuda's coastline, it is surrounded by St. George's Parish in the north, east, south (Tucker's Town), and Hamilton Parish in the west. A chain of islands and rocks stretches across the main opening to the Atlantic Ocean, in the east, notably Cooper's
Geology of Bermuda southeast indicate that Bermuda volcanoes were exposed above the water and eroding by the Oligocene. The volcano that built the island's basement is inferred to be mid-plate hotspot volcanism. Eolian limestone and hills dominates much of the surface geology of Bermuda, interbedded with layers of paleosols. Geology of Bermuda The geology of Bermuda represents an isolated limestone island in the Atlantic at the edge of the shallow Bermuda Platform. This platform is part of the larger Bermuda Pedestal (other high points include the Challenger and Plantagenet banks, separated by water 1000 feet deep. The island's volcanic basement rock is relatively