Leptodus nobilis (Permian Brachiopoda) from a boulder in the basal conglomerate of the Pliocence Kume Formation, Hitachi area, central Japan

DOI Web Site Web Site 4 References

Bibliographic Information

Other Title
  • 日立地域の鮮新統久米層基底礫岩の礫から産出したペルム紀腕足類レプトダス・ノビリス
  • ヒタチ チイキ ノ センシントウ クメソウ キテイレキガン ノ レキ カラ サンシュツ シタ ペルムキ ワン ソクルイ レプトダス ・ ノビリス

Search this article

Abstract

<p>A Permian brachiopod species, Leptodus nobilis, is identified for the first time in argillaceous limestone boulders within the basal conglomerate of the Pliocene Kume Formation, Hitachi area, central Japan, and added to the Ishinazaka fauna. This fauna, consisting of 18 species in 17 genera, is assigned to the Wordian stage (middle Permian). In terms of palaeobiogeography, the Ishinazaka fauna has a close affinity with the middle Permian brachiopod faunas of northeastern Japan (South Kitakami Belt), eastern Russia (South Primorye), and northern China (Inner Mongolia). The fossil-bearing boulders were probably derived from the Ayukawa Formation within the Hitachi Palaeozoic rocks. Therefore, the Hitachi area was probably part of a continental shelf situated along the eastern margin of North China (Sino-Korea) during the Wordian, and the Ayukawa Formation belongs to the South Kitakami Belt, northeastern Japan.</p>

Journal

References(4)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top