Coral reef to form fringing reefs, and can eventually grow become a barrier reef. Where the bottom is rising, fringing reefs can grow around the coast, but coral raised above sea level dies. If the land subsides slowly, the fringing reefs keep pace by growing upwards on a base of older, dead coral, forming a barrier reef enclosing a lagoon between the reef and the land. A barrier reef can encircle an island, and once the island sinks below sea level a roughly circular atoll of growing coral continues to keep up with the sea level, forming a central lagoon. Barrier reefs
Lymington Open Air Sea Water Baths A seawater pool and smaller baths were on the same site in the 1780s. (There was a Roman camp near Lymington ("Lentune", "Lementon"), but there is no evidence of baths.) The current lido was built in 1833 by William Bartlett of the Lymington Bath and Improvement Co. with donations of £6,000. From 1872 the lido was run by Mrs Beeston. The local Corporation acquired the site in 1937. The local St Barbe Museum has information on the pool history. Lymington Open Air Sea Water Baths The Lymington Open Air Sea Water Baths (or "historic Roman Seawater Baths") is a lifeguarded