Two Late Pennsylvanian conodont species, Gondolella sublanceolata Gunnell and Idiognathodus sulciferus Gunnell, were extracted from limestone boulders in the Mizuboradani Valley, Fukuji district, central Japan. These provide the first evidence of Missourian (Kasimovian) cosmopolitan conodonts in the Akiyoshi and Hida Gaien belts, Inner Zone of Japan. The limestone boulders might be derived from the Ichinotani Formation and/or from limestone clasts in conglomerates of the Permian Sorayama Formation that crop out in the Mizuboradani Valley.
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1 July 2018
Missourian (Kasimovian, Late Pennsylvanian) Conodonts from Limestone Boulders, Mizuboradani Valley, Gifu Prefecture, Central Japan
Takumi Maekawa,
Toshifumi Komatsu,
Gengo Tanaka,
Mark Williams,
Christopher P. Stocker,
Masatoshi Okura,
Akihiro Umayahara
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Paleontological Research
Vol. 22 • No. 3
July 2018
Vol. 22 • No. 3
July 2018
conodont
Ichinotani Formation
Late Pennsylvanian
limestone boulders
Mizuboradani Valley
Sorayama Formation