書誌事項
- タイトル別名
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- Flood-plain Deposits and Fossil Assemblages of the Middle Pleistocene Kiyokawa Formation, Shimosa Group, Eastern Japan
- リクセイ セキツイ ドウブツ カセキ オ サンシュツ スル ハンラン ゲン タイセキブツ コウシントウ シモウサソウグン キヨカワソウ ノ レイ
- 更新統下総層群清川層の例
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説明
Sedimentary processes accumulating and preserving terrestrial vertebrate fossil assemblages in a flood plain were examined from the middle Pleistocene Kiyokawa Formation in Chiba Prefecture, eastern Japan.<br>The flood-plain deposit is divided into three depositional units by lithology and fossil assemblages: A, B, and C Units. Unit A consists of massive mud with many plants remains from wash load by flooding. Unit B, which is composed of ill-sorted muddy sands or sandy muds, contains numerous wood debris, isolated terrestrial vertebrate remains, freshwater molluscan shells, and mudstone clasts. It may have been accumulated by a mudflow accompanying flooding. These fossil assemblages also indicate that these sediments come from a larger area than the stream channel. Unit C consists of massive muds and alternating layers of silts and fine-grained sands with in-situ freshwater bivalves and turtle remains. These fossils indicate that Unit C is a deposit of still water as a pond or shallow lake environment.
収録刊行物
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- 第四紀研究
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第四紀研究 43 (5), 359-366, 2004
日本第四紀学会
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キーワード
詳細情報 詳細情報について
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- CRID
- 1390282681472531968
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- NII論文ID
- 10014188476
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- NII書誌ID
- AN0034136X
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- ISSN
- 18818129
- 04182642
- http://id.crossref.org/issn/04182642
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- NDL書誌ID
- 7117303
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可
