Calibrated radiocarbon ages of beach rock samples and late Holocene sea-level change of Amami Islands, southwest Japan
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概要
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A total of 87 beach rock samples were collected from 37 sites of Amami Islands in order to determine formative ages of beach rocks on Amami Islands, and to clarify the sea-level change during the late Holocene period. Beach rocks began to form 5,720 yrs cal BP on Yoron Island at first, and formed continuously between 4,050 yrs cal BP and 380 yrs cal BP on the sandy coasts of Amami Islands. Relative sea-levels during the late Holocene period on Yoron Island and Okinoerabu Island were slightly higher than those of the present sea-level. Geomorphic evidences indicate that the islands have probably uplifted by earthquakes occurred along the subduction zone of Eurasian Plate. However the sea-level has remained similar to the present since at least the past 4,000 years at Amami-Oshima Island.
論文 | ランダム
- Introduction : Chapter I
- エキルギー、税制、金融に焦点 今こそ景気のブレークスルーを--国民の一体感をてこに
- 求められる銀行の積極融資 金融緩和で日本経済の再生を--資産効果が消費・投資意欲高める
- 景気浮揚策の新たな視点 穏健な地価上昇で閉塞感の打破を目指せ--「資産効果」活用の条件を考える
- 日本経済回復の足掛かりを求めて 不動産取引の活性化で金詰まりを緩和--金融による資産政策で新「埋蔵金」を掘り起こす