書誌事項
- タイトル別名
-
- Paleoenvironmental changes and a tsunami deposit inferred from fossil diatom assemblages at Ohki lowland in Tosashimizu City, Kochi Prefecture, western Japan
- ケイソウ カセキ グンシュウ カラ アキラカ ニ ナッタ コウチケン トサシミズシ ノ ダイキテイチ ニ オケル コ カンキョウ ヘンドウ ト ツナミ タイセキブツ
この論文をさがす
抄録
<p>Fossil diatom assemblages and stratigraphic features revealed the environmental history and an event deposit at a coastal lowland in Tosashimizu City, facing the Nankai Trough. The paleoenvironment of the study site changed during the last 600 years from a sandy tidal flat, a standing-water environment with submergent plants, to a wetland. A sandy event deposit identified by bare eyes and computed tomography (CT) images was interpreted to have formed under the standing-water environment. The event deposit (Sand B) was diagnosed as a tsunami deposit based on sedimentary structures, mixed assemblages of freshwater, brackish–marine diatoms, and the environmental change before and after the event. The depositional age of the Sand B was constrained by radiocarbon ages as 550–495 cal yr BP (1411–1453 CE; Common Era). This constrained event age indicated that the Sand B might have been formed by an unknown tsunami associated with an earthquake along the Nankai Trough, although either 1361 Shohei or 1498 Meio earthquake were the other possible origins of the Sand B regarding the error range of radiocarbon dating.</p>
収録刊行物
-
- Diatom
-
Diatom 37 (0), 8-21, 2021
日本珪藻学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390570309681198208
-
- NII論文ID
- 130008067968
-
- NII書誌ID
- AA11130739
-
- ISSN
- 21868565
- 09119310
-
- NDL書誌ID
- 033160069
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可