941. LOWER AND MIDDLE TRIASSIC RADIOLARIANS FROM MT. KINKAZAN, GIFU PREFECTURE, CENTRAL JAPAN

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  • 941. 岐阜県金華山の下部～中部三畳系より産する放散虫化石
  • 岐阜県金華山の下部～中部3畳系より産する放散虫化石〔英文〕
  • ギフケン キンカザン ノ カブ チュウブ 3ジョウケイ ヨリ サンスル ホウサ

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Well-preserved radiolarians have been obtained from the Lower and Middle Triassic in Mt. Kinkazan, Gifu City, Gifu Prefecture, central Japan. They are represented by three assemblages, namely the Parentactinia nakatsugawaensis assemblage (Spathian or older), Hozmadia gifuensis sp. nov. assemblage (early Anisian) and Triassocampe coronata assemblage (middle Anisian). On the basis of field observations, radiolarian dating and some sedimentological examinations, the general stratigraphy in the studied area is tentatively reconstructed as a sequence of Lower Triassic black shale, siliceous shale to chert, and Middle Triassic bedded chert in ascending order. The occurrence of Permian radiolarians in the studied area is also discussed. Twenty-six species are newly described and four new genera are also proposed herein.

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