Sedimentary Facies and Chronology of Core Samples from Lake Mikata, Lake Suigetsu and Kurota Lowland, Central Japan. Sedimentary environment in Mikata Lowland since the last interglacial time.

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  • 三方湖・水月湖・黒田低地の堆積物の層相と年代　三方低地の最終間氷期以降の堆積環境
  • ミカタコ スイゲツコ クロタ テイチ ノ タイセキブツ ノ ソウソウ ト ネン
  • Sedimentary environment in Mikata Lowland since the last interglacial time
  • 三方低地の最終問氷期以降の堆積環境

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Abstract

The sediments of Mikata Lowland (including Mikata Five Lakes), central Japan, contain a potential record of paleoenvironments and paleoclimates that date since the last interglacial time. Three continuous drill cores of lake and fluvial sediments in Mikata Lowland were obtained in 1991-1993, from Lake Mikata, Lake Suigetsu and Kurota Lowland. Dating of core samples by a combination of tephrochronology and 14C dating has revealed that three core samples include the paleoenvironmental history since at least the most recent interglacial time. The sedimentation process in Mikata Lowland has also been clarified by the sedimentary facies of core samples. The average sedimentation rate in Lake Mikata is twice as large as in Kurota Lowland which situated at the southern part of Mikata Lowland.

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