775. EARLY CARBONIFEROUS (VISEAN) BRACHIOPODS FROM THE HIKOROICHI FORMATION OF THE KITAKAMI MOUNTAINS, NORTHEAST JAPAN

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  • 775. 北上山地の日頃市層より産出した前期石炭紀 (ビゼー期) 腕足類
  • 北上山地の日頃市層より産出した前期石炭紀(ビゼー期)腕足類〔英文〕
  • キタカミ サンチ ノ ヒコロイチソウ ヨリ サンシュツシタ ゼンキ セキタンキ

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A brachiopod fauna from the upper 105m of the Hikoroichi Formation of the southern Kitakami Mountains suggests a Late Visean age for that part of the formation. It matches well with the fact that the Hikoroichi Formation is overlain conformably by the Upper Visean Onimaru Formation. The fauna includes the following species : Schizophoria resupinata, Rhipidomella sp., Orthotetes sp., Pustula cf. pustulosa, Karavankina sp., Cleiothyridina sp., Spirifer sp., Choristites bisulcatus and Tomiopsis sp.

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