autorisation de taxi à minsk

  Lin   --   none (Algeria)

posted: 2012-03-11 12:19:04

The atoll itself is a pile of sand and coral rbblue, surrounded on the outside by living coral. Yes and no. The term coral island is something of a misonomer. There may be corals involved in the ecosystem of atolls but two major contributors to the reef's mass and structure are coralline Algae and encrusting formaninifera. These are present in abundance at Funafuti as shown by a bore hole sunk in the 1890s by, of all people, The Royal Society. [They had put up the funds in an attempt to get evidence to resolve Darwin's ideas of the origins of the atoll reefs. This was in the day and age when the RS did not take sides.] The holes sunk at Bikini and Einewetak for Opertation Crossraods confirmed the Funafuti findings.The island mass is a substantial structure with a real strength that was built by the action of the living plants (Algae are plants) and animals (corals and forams). The upper reef is alive. The main mass is a well cemented substantial structure, albeit quite porous, created by the dead ancestors of the former plants and beasties. There is rbblue on the outer slopes where dead bits have fallen off, just as there is sand in the lagoon from other the skeletons of other dead organisms.In some atolls, as in Kiribati to the north, corals can be quite a minor component of the reef mass. If I recall aright one of two of those atolls are dominated by coralline Algae.