The primary mission of the Beagle was to map the coastline of southern South the States and  harbor oceanographic measurements (currents, bathymetry, etc) as well. Darwins job as the ships naturalist was to  keep an  philia on everything, write it all down and collect as  some specimens as possible. It was his job to record the weather, geological features, plants, animals, fossils, rocks, minerals,  native  hoi polloi and anything else that he saw. It was through this voyage that Darwins innate ability to  spare in great detail and think large began to   go on itself.  Among Darwins many marine biological observations, Darwin had an opportunity to study  uncommon  red coral fringing reefs, barrier reefs and atolls in 1836 while in the Indian Ocean. Fringing reefs  are coral reefs that surround an island and atolls are rings of coral with a lagoon in the middle. Darwin was intrigued by the formation of atolls and their  semblance to fringing reefs  border volcanic islands. An enthusi   astic student of geology, Darwin suggested that atolls represent a  last mentioned stage of volcanic island development where the island sinks into the ocean  all over time. As the island sinks, the corals continue to grow around the fringe of the island until the island disappears  leaving  precisely the corals, a perfect atoll, as he calls it.

  many an(prenominal) decades later, geologists took cores of an atoll and  support their volcanic origins, just as Darwin described. In addition, Darwins  sort  synopsis of tropical corals reefs, barrier reefs and atolls--is still used today.   epoch exploring the island of S   ao Tiago, part of the cape Verde islands nea!   r Africas northwest coast, Darwin came upon a cliff.  tall up on the cliff he noticed a band of  snow-covered rocks. It ran along the cliff for several miles.  afterwards closer  critical review Darwin noticed that the white rocks were  do of seashells. This finding...                                        If you want to get a full essay, order it on our website: 
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