영산강 하류 유역에 분초하는 유기물층에 관한 연구 - 양장리 일대를 중심으로 - = Study of Organic Matter Layer Distributed in the Basin of Yeongsan River Downstream - example of Yangjangri -

다국어 초록 (Multilingual Abstract)

The study area Is a 「Yangjangri」, which is located near of estuary in Yeongsan River. The purpose of this study is to find the depositional environment of organic matter layers in alluvial deposits at Yangjangrl area and to clarify the geomorphic development of these deposits in relation to post-glacial sea level changes. The analytic methods, such as the classification of micro topography and the analysis of depositional facies of boring data, grain size and pollen are employed for this study. The main findings are as follows; The organic matter layers(7.5Y 2/1) found in a Yangjangri were caused by bog sediments which were formed In the process that river valleys were downed under the periglacial climatic environment of the last glacial age and then buried by the transgression of post glacial age. Namely, the study area was influenced by the sea-level fall during 1645±75y. BP. and then covered with the bog sediments formed through the sea-level rise.