書誌事項
- タイトル別名
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- アキタケン ホクブホウハマ チイキ ニ ブンプ スル ジョウブ センシントウ : カブ コウシントウ ノ フユウセイユウコウチュウ カセキソウ ジョ
- Upper Pliocene to lower Pleistocene planktic foraminiferal biostratigraphy from Minehama area in the northern part of Akita Prefecture, Japan
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説明
Planktic foraminiferal biostratigraphy of the upper Pliocene to lower Pleistocene Tentokuji and Sasaoka Formations distributed in the Minehana area located in the northern part of Akita Prefecture, Japan, is described in detail. Totally 44 samples were analyzed for this study. Based on calcareous nannofossil and planktic foraminiferal assemblages, the studied section includes the horizon of global cooling that was resulted from Northern hemisphere galaciation in the latest Pliocene. Globigerina bulloides and Globigerina quinqueloba occurred throughout the studied section. Cold-water planktic foraminifera were generally observed in the middle to upper part of studied section. Especially, a polar to subpolar dweller, Neogloboquadrina pachyderma (sinistral coiling variety), was found commonly just after global cooling at latest Pliocene while dextral coiling variety of this species, which thrived in warmer water, were rare in the middle to upper part of the studied section. On the other hand, tropical to subtropical species such as Globigerinoides ruber were also found at the upper part of the studied section. It indicates that the studied area seems to be covered by warm water in the early Pleistocene.
収録刊行物
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- 秋田大学大学院工学資源学研究科研究報告
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秋田大学大学院工学資源学研究科研究報告 36 9-14, 2015-10-31
秋田大学大学院工学資源学研究科
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詳細情報 詳細情報について
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- CRID
- 1050282677538824448
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- NII論文ID
- 120005678459
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- NII書誌ID
- AA12500403
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- ISSN
- 21861382
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- HANDLE
- 10295/2990
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- NDL書誌ID
- 027036377
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- 本文言語コード
- ja
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- 資料種別
- departmental bulletin paper
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- データソース種別
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- IRDB
- NDL
- CiNii Articles
- KAKEN