珪藻遺骸群集からみた北海道厚岸地方における完新世後半の相対的海水準変動と古環境の復元 Late Holocene relative sea-level changes and reconstruction of paleoenvironment by diatom fossil assemblage analysis in Akkeshi Moor, Hokkaido, northern Japan

この論文にアクセスする

この論文をさがす

著者

    • 沢井 祐紀 Sawai Yuki
    • 九州大学理学部地球惑星科学教室 Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University
    • 鹿島 薫 Kashima Kaoru
    • 九州大学理学部地球惑星科学教室 Department of Earth and Planetary Sciences, Faculty of Science, Kyushu University

抄録

Paleoenvironmental surveys, using diatom assemblage analysis, have been carried out in Akkeshi Moor and its surroundings to obtain records of Holocene sea-level changes. Surface sediments from various modern environments were taken, and water salinity at each locality was measured to assess geographical distribution, environmental optima and tolerance of living diatom species. The living diatoms were classified into eight species-groups that characterize the following environments : (I) fresh water, (II) fresh water (adhered to plants), (III) moor, (IV) brackish water, (V) brackish water (gregarious on aquatic plants), (VI) mud marsh in brackish water, (VII) saline water (gregarious on aquatic plants), and (VIII) outer and inner bays. Fossil diatom assemblages and radiocarbon ages of drilled core samples from three sites in the moor were then examined, demonstrating relative sea-level fluctuations during the last five thousand years, with the following sequence of events : (1) a shallow bay spread over most of Akkeshi Moor, with gregarious oysters around the moor (ca. 4700 yr B. P.), (2) the sea-level became about 1 meter below the present level (ca. 2700yr B. P.) and (3) the sea-level increased to become about 1 meter above the present level (ca. 1000 yr B. P.), then moor vegetation formed after this transgression.

収録刊行物

  • 化石

    化石 (61), 21-31, 1996-12-15

    日本古生物学会

参考文献:  18件中 1-18件 を表示

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    110002704238
  • NII書誌ID(NCID)
    AN00041606
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00229202
  • NDL 記事登録ID
    4119608
  • NDL 雑誌分類
    ZR1(科学技術--生物学) // ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z18-838
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS 
ページトップへ