Middle Permian foraminifers of the Izuru and Nabeyama Formations in the Kuzu area, Tochigi Prefecture, Japan : Part 1. Schwagerinid, neoschwagerinid, and verbeekinid fusulinoideans

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概要

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• The Middle Permian Izuru and Nabeyama Formations in the Kuzu area, Tochigi Prefecture are composed of thick basaltic rocks and fossiliferous partly dolomitized limestone. Fusulinoidean biostratigraphy is first established in these two formations, and the stratigraphic distribution of the 30 species of fusulinoideans distinguished from 70 localities is shown. The Izuru and Nabeyama Formations are biostratigraphically subdivided into the lower Parafusulina nakamigawai, the middle Parafusulina yabei, and the upper Parafusulina tochigiensis zones. The first zone is correlated to the Parafusulina nakamigawai Zone of the basal part of the Akasaka Limestone. The middle part of the third zone corresponds to the upper part of the Neoschwagerina craticulifera Zone to the lower part of the Neoschwagerina margaritae Zone of the Akasaka Limestone based on the occurrence of Gifuella amicula. More precise correlation of the Parafusulina yabei and Parafusulina tochigiensis zones will be possible when biostratigraphic zonation by schwagerinids is made clear in relation to the stratigraphic range of neoschwagerinids in Middle Permian limestones of the Jurassic terrane of Japan. Seven species of Parafusulina including two new species, P. shimotsukensis and P. tochigiensis, and Pseudodoliolina ozawai and Gifuella gifuensis are described and discussed herein.

• 日本古生物学会の論文
• 2006-04-30

著者

• KOBAYASHI FUMIO

  Institute of Natural and Environmental Sciences, University of Hyogo

• Kobayashi Fumio

  Institute Of Natural And Environmental Sciences Himeji Institute Of Technology

関連論文

• Middle Permian (Midian) foraminifers of the Kamiyasse Formation in the Southern Kitakami Terrane, NE Japan
• Middle Permian foraminifers of the Izuru and Nabeyama Formations in the Kuzu area, Tochigi Prefecture, Japan : Part 1. Schwagerinid, neoschwagerinid, and verbeekinid fusulinoideans
• Late Paleozoic and Mesozoic foraminifers contained in limestone fragments of the Kamade Breccia of the Upper Cretaceous Aioi Group from Kamade, northeastern part of Aioi, Hyogo, Japan
• Middle Permian foraminifers of Kaize, southern part of the Saku Basin, Nagano prefecture, central Japan
• Foraminiferal fauna and lithofacies of Middle Permian limestone blocks in the middle course of Kuma River (Osakama), southern margin of the Chichibu Terrane in west Kyushu, Japan
• Carboniferous and Permian foraminifers from limestone fragments contained in the Upper Cretaceous Hiromine Formation in north of Himeji, Hyogo, Japan
• Early Anisian (Triassic) foraminifers from the Hiraki Formation of the Maizuru Terrane in the Tatsuno-Aioi area, Hyogo Prefecture, Japan
• Lithology and foraminiferal fauna of allochthonous limestones (Changhsingian) in the upper part of the Toyoma Formation in the South Kitakami Belt, Northeast Japan
• Middle Permian foraminifers of the Izura and Nabeyama Formations in the Kuzu area, central Japan : Part 2. Schubertellid and ozawainellid fusulinoideans, and non-fusulinoidean foraminifers

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