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Aira Caldera is almost rectangular in shape related to local faulting and was created in a series of large scale of pyroclastic surges that contributed to the Shirasu-Daichi pyroclastic plateau with the last now dated to 29,428 to 30,148 years calibrated before present [7] [1] [2] although earlier work had the date at ~22,000 years ago with ...
A major three phase eruption of the Aira Caldera formed in the first phase the Osumi pumice fall, had a second phase Tsumaya pyroclastic flow and in the third Ito eruption phase produced the widely distributed Aira-Tn tephra that has been dated at 29,428 to 30,148 years calibrated before present.
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A volcano that once existed in the northern part of Kagoshima Bay caused an eruption called the Great Aira Eruption about 25,000 years ago, forming the Aira Caldera. Aira City is located on the northwest side of this caldera, on the somma, and there is a stratum called Shirasu, which originated from pyroclastic flows that flowed out during a ...
Aira Caldera Kyūshū Unknown 450 Oda Ignimbrite 7 Diamante Caldera Andes, Southern Volcanic Zone Unknown 450 7 Aira Caldera Kyūshū Unknown 500 Yoshino Ignimbrite 7 Toba Caldera Sunda Arc, Sumatra 138 500 Middle Toba Tuff 7 Kobayashi Caldera: Kyūshū Unknown 520 Kobayashi Ignimbrite 6 Galeras Andes, Northern Volcanic Zone Unknown 560 7
In classical antiquity, Europe was assumed to cover the quarter of the globe north of the Mediterranean, an arrangement that was adhered to in medieval T and O maps. Ptolemy's world map of the 2nd century already had a reasonably precise description of southern and western Europe, but was unaware of particulars of northern and eastern Europe.
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