Скачать или смотреть Easter Islands | Moai | Rapa Nui | Chile | Isla de Pascua.

The small and hilly island is not part of a sunken landmass but is a typical oceanic high island formed by volcanoes rising from the seafloor. Geologic and oceanographic evidence shows that no perceptible emergence or submergence of the island’s coastline has taken place since the last fall in sea level, which occurred less than 10,000 years ago. However, in the early 21st century Easter Island experienced increasing coastal erosion because of rising sea levels, which also threatened various archeological sites. Three extinct volcanoes chiefly composed of tuff (a porous rock formed of compacted volcanic fragments) and joined by their own lava flows give the island its characteristic triangular shape. Parasitic tuff craters and cones (i.e., craters and cones formed on the side of, or near, volcanoes after the original vent has become plugged up) are interspersed in the landscape, which is otherwise dominated by eroded lava fields in which obsidian is commonly found.

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