A Study of the Environment Change from Moor Deposits during the Late Pleistocene and Holocene in the Eastern Japan.

在日本东部的山区，有许多沼泽是在与周围山脉阻隔的地形环境中形成的。这些沼地富含泥炭或泥炭粘土。泥炭沉积物主要由未被完全分解的湿地植物遗骸组成。为了重建泥炭沉积时期的古环境条件，在日本东部各沼地进行了钻孔。从泥炭床上采集了许多样本。然后对这些样品进行了标记体鉴定和对比、放射性碳定年和花粉分析。这项研究表明，许多泥炭可以追溯到末次冰期，而通常认为这是在后冰期形成的。这项研究产生了许多关于环境条件变化的发现，包括地形和气候。1992年至1994年，在太平洋一侧伊豆半岛南部的斋石大池沼地、内陆地区的Yashimagahara沼地（长野县）和日本海地区大雪地区的Ohsone沼地（福岛县）、Naebayama沼地（长野县）和Komatsubara沼地（新泻县）进行了研究。结果表明，斋石大池沼地形成于末次冰期，其他沼地形成于全新世。在此基础上，研究了末次冰期寒冷气候的开始以及暴雪对植被的影响。

In the mountainous regions in the eastern Japan, there are many moors formed in a topographical environment where blocked with surrounding mountains. These moors are rich in peat or peaty clay. The peaty deposits mainly composed of remains of wetland plants, that had not been completely decomposed. To reconstruct paleo-environmental conditions, at the time of peat deposition, boring was made in various moors in the eastern Japan. Many samples were gathered from peat beds. Then these samples were subjected to identification and correlation of marker tephra, radiocarbon dating, and pollen analysis. This study shows that many of peats can be traced to the last glacial, which is conventionally believed to have been formed in the post glacial. This study produced many findings with respect to changes in the environmental conditions including topography and climate.From 1992 to 1994, studies were conducted in the Jaishi Oike moor in southern part of Izu Peninsula on the Pacific Ocean side, the Yashimagahara moor (Nagano Prefecture) in an inland region, and the Ohsone moor (Fukushima Prefecture), the Naebayama moor (Nagano Prefecture) and the Komatsubara moor (Niigata Prefecture) in areas of heavy snowfall in the districts Japan Sea.In conclusion, the Jaishi Oike moor was formed during the last glacial, and other moors were formed in the Holocene. Based on these studies, we examined the beginning of cold climate in the last glacial and the influence of heavy snowfall to vegetation.