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Line 48: ===Motobu and Yonamine Formations=== The Motobu and Yonamine Formations are [[Permian]] rocks that constitute the basement of the Motobu peninsula of [[Okinawa Island]], Central Ryukyu.<ref name=":10">{{cite journal \|last1=Ishibashi \|first1=T. \|title=Stratigraphy of the Triassic Formation in Okinawa-jima, Ryukyus \|journal=Memoirs of the Faculty of Science, Kyūsyū University. Series D, Geology \|date=1969 \|volume=19 \|issue=3 \|pages=373–385 \|doi=10.5109/1543682\|doi-access=free }}</ref> The Motobu Formation consists mainly of [[limestone]] interbedded with [[chert]] and [[phyllite]].<ref name=":11">{{cite report\|last1=Flint\|first1= D. E.\|last2= Saplis\|first2= R. A.\|last3=Corwin\|first3= G.\|date=1959\|title=Military geology of Okinawa-jima, Ryūkyū-Rettō\|volume=5 (Geology)\|publisher= US Army Pacific, Office of the Engineer\|url=https://~~www~~books.google.com/books~~/edition/Military_Geology_of_Okinawa_Jima_Ry%C5%ABky/~~?id=65ocAQAAMAAJ\|via=Google Books}}</ref> The limestone contains [[foraminifera]] fossils of Permian age.<ref name=":9" /> The Yonamine Formation, with strata of interbedded phyllite, [[slate]], [[sandstone]], limestone, greenstone, and chert,<ref name=":11" /> underlies the Motobu Formation<ref name=":12">{{cite journal\|last1=Konishi\|first1= K.\|date=1963\|title=Pre-Miocene basement complex of Okinawa, and the tectonic belts of the Ryukyu Islands\|journal=Science Reports of Kanazawa University\|volume=8\|issue=2\|pages= 569–602\|url=http://scirep.w3.kanazawa-u.ac.jp/articles/08-02-017.pdf}}</ref> and contains Permian corals.<ref name=":13">{{cite journal \|last1=Haikawa \|first1=T. \|last2=Ishibashi \|first2=T. \|title=Waagenophyllum (Waagenophyllum) okinawense, a new Permian coral from Okinawa-jima, Ryukyu Islands : Paleontological Study of the Ryukyu Islands－VII \|journal=Memoirs of the Faculty of Science, Kyūsyū University. Series D, Geology \|date=1981 \|volume=24 \|issue=3 \|pages=179–188 \|doi=10.5109/1546074\|doi-access=free }}</ref>

Ryukyu Arc: Difference between revisions