Gzhelian-Asselian Palaeoaplysina reef in atoll carbonates of
the Akiyoshi Terrane, SW Japan: A peculiar community
in the Panthalassan reef evolution |
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| Authors: | Tsutomu NAKAZAWA and Katsumi UENO |
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| Institution: | Geological Survey of Japan, AIST, Tsukuba Central 7, Tsukuba 305-8567, Japan;Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka 814-0180, Japan |
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| Abstract: | A Palaeoaplysina reef occurs in the Gzhelian-Asselian interval of the Panthalassan atoll carbonates, Akiyoshi Terrane, SW Japan. An alga, Palaeoaplysina was paleogeographically distributed mainly along the northern margin of Pangea and is regarded as a boreal element. Its distribution extended to the tropical or subtropical area of the Panthalassa Ocean caused by global cooling during an icehouse period. The Palaeoaplysina community was succeeded by a calcisponge community in the late Early Permian. This biotic turnover almost corresponds to the climatic change from icehouse to greenhouse conditions and coincides with the timing of a superplume activity in the mid-Panthalassa Ocean. |
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| Keywords: | Carboniferous-Permian Palaeoaplysina reef evolution Panthalassan atoll Akiyoshi |
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