He has long enjoyed a reputation, but recently, thanks to the eruption of 1866, particularly attracted general attention. Group of Santorini or Thera, consists of several islands. The main island of Thera has the shape of a horseshoe. Together with the islands and Terazije Aspronizi (White Island), he is torn in several places in the ring, inside the latter is a lot of small islands: Palia Kaymeni, Nea Kaymeni, Micro Kaymeni (Ancient, New and Little Burnt Island), and finally, a tiny island Mayonizi. All these islands are formed by volcanic rock, except only serves Thera, on the east bank of which lies a great mountain Elijah, consisting of schists and marble. The outer ring of the group believed the crater of elevation, inside of which, by the accumulation of eruptive products formed small islands. But accurate studies have shown that in the islands of Thera, Terazije Aspronizi and some layers of lava, ash and cinders lie horizontally, the other to a greater or lesser degrees of tilt. This fact, as well as a number of other phenomena that have not agreed with the theory of lifting. There is no doubt that we are dealing here with a ring formed by the accumulation. Detailed studies of the last time together with the reports that we find among the ancient writers have allowed to reconstruct the history of education of Santorini with sufficient accuracy. In the late Pliocene epoch there existed a small rocky island, consisting of slate and marble - Contemporary Mount Elijah. Back in the Pliocene epoch began erupting westward from this place, and they lasted for most of the diluvial (glacial) epoch, and formed a huge volcanic cone, and he took such a large area, which merged with the ancient rocky islets. The remains of the cone and put forward now as islands of Thera, Terazije and Aspronizi. This volcano existed at the time, when a group of Santorini was inhabited by people standing is not at the lowest levels of culture. But no written memorial of this time did not reach us.
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