Ryukyu Arc: Difference between revisions

Revision as of 20:59, 20 November 2022

Revision as of 21:06, 20 November 2022

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===Tomuru Formation===

The Tomuru Formation is distributed in the [[Iriomote Island|Iriomote]] and [[Ishigaki Island|Ishigaki]] Islands of the Yaeyama Islands, Southern Ryukyu.<ref name=":5" /><ref name=":14">Nishimura, Y. (1998). Geotectonic subdivision and areal extent of the Sangun belt, Inner Zone of Southwest Japan. ''Journal of metamorphic Geology, 16''(1), 129–140.</ref><ref name=":15">Nakagawa, H., Doi, N., Shirao, M., Araki,Y. (1982). Geology of Ishigaki-jima and Iriomote-jima Yaeyama Gunto, Ryukyu Islands. ''Contributions from the Institute of Geology and Paleontology, Tohoku University 84'', 1–22</ref> The formation has an age of 220–190 [[megaannum|Ma]] (million years ago) (Late [[Triassic]]-Early [[Jurassic]]) and comprises ultramafic rocks and high pressure/temperature (P/T) metamorphic rocks, i.e., metagabbro and mafic, siliceous, and pelitic schists.<ref name=":14"></ref><ref name=":16">Miyazaki, K., Ozaki, M., Saito, M., Toshimitsu, S. (2016). The Kyushu-Ryukyu Arc. ''The Geology of Japan'' (pp.139–174). Geological Society, London. </ref>

===Fusaki Formation===