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박승필 전남대학교 사회과학연구소 1991 현대사회과학연구 Vol.2 No.1
The purpose of this study is to elucidate the characteristics and origins of largy angular blocks mantle on the slope of Mt. Moo Deung. For this purpose, the shape, size, sedimentary facies of blocks, the fabric of the surface blocks are analyzed and examined The results are as follows: 1. Blocks mantle consists of angular boulders in average 0.5-1m. The blocks are hard rock, but the surface area of blocks is slightly weathered, for example, micro weathered features, tafoni. 2. The $quot;a$quot;orientation of the surface blocks tends to be parallel to the local slope and the $quot;a$quot;dip is less steeply inclined by 10 degree than local slope gradient. 3. The sedimentary facies of blocks consist of four layered structure showing from top to bottom (1)angular boulders interlocked with no fine material matrix (2)angular blocks m cobble size with no matrix, since the surface area of this blocks is very thinly coated with reddish yellow silt and clay. the surface of blocks is changed in color. (3)interstitial humic mud between the angular blocks in pebble size (3)angular pebbles with reddish yellow silty sand and clay matrix. This layer rests on deep weathered basal rock. 4. The blocks mantle of Mt. Moo Deung is a kind of block slopes formed under periglacial conditions during late Pleistocene. 5. The present writer suggests that block slopes of Mt. Moo Deung have a developmental history comprising (1)the forming of micro weathered features and deep weathered mentle of basal rock by chemical weathering in the pre-Pleistocene (2)production of blocky material and development of frost sorting by frost action (3)movement by mass-wasting relevant to solifluction (4)subsequent removal of interstitial matrix and deposition of black humic mud.
영산강 하류 유역에 분초하는 유기물층에 관한 연구 : 양장리 일대를 중심으로 example of Yangjangri
박승필,위현정 한국지형학회 1996 한국지형학회지 Vol.3 No.2
본 연구에서는 영산강 하류 유역의 양장리 일대에 분포하는 충적지에서 관찰된 다량의 유기물을 포함하고 있는 충적층을 대상으로, 퇴적층 구조와 퇴적상을 밝히고 粒度分析 및 花粉分析을 실시하였다. 이를 통하여 양장리 일대 층적층의 특성과 퇴적환경을 究明하였으며, 흑색 유기물층이 소택지 환경에서 생성되었음을 밝혔다. 양장리 일대는 지난 빙기 동안 한냉한 환경 하에서 건특상태의 산골짜기에 sollfluction 퇴적물이 덮이고, 후빙기 이래 기온상승에 따라 해수면이 상승하면서 침수된 후, 소택지가 형성되면서 청회색 또는 암회색의 glei층이 생성되었다. 해수면의 미변동을 겪으면서 본 연구지역은 B.P. 1,645±75년 경에는 육지화한 상태였으며 해수가 침입되지 않는 위치였으나 다시 해수면의 상승으로 저습지성의 소택지화한 후 흑색유기물층이 형성되었다. 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.