"Shelly softground" colonized by an endobyssate bivalve, Modiolus kurilensis : an example of taphonomic feedback from the Pleistocene of Kanazawa, Japan

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概要

• 論文の詳細を見る

• Colonization by an endobyssate bivalve Modiolus kurilensis was possible only in shelly softground conditions, that is, on a soft bottom with the shells being slightly buried with fine sediment. The Pleistocene Omma Formation, Kanazawa, generally exhibits a shelly bottom carpeted by shells (shell pavement) or a shelly bottom covered by soft sediment too thick to allow colonization by Modiolus. The described Modiolus colony was found in the lower unit of the Omma Formation, where sealevel change was relatively small and where shelly softground conditions were present. In contrast, Modiolus is much less common in the shell beds in the cyclothemic middle unit of the formation. An important environmental factor accounting for the uncommon occurrence of Modiolus in cycle-bounding shell beds is their repeated physical reworking followed by deposition of soft sediment too thick to be colonized by Modiolus.

• 日本古生物学会の論文
• 1995-12-30

著者

• KONDO Yasuo

  Department of Food Technology, Faculty of Engineering, Toua University

• Kikuchi Naoki

  Faculty Of Engineering Kanagawa University

• Kikuchi Naoki

  Department Of Food Science And Technology Tokyo University Of Fisheries

• Kikuchi N

  Faculty Of Engineering Kanagawa University

• Kondo Yasuo

  Department Of Earth Science Faculty Of Science Kochi University

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