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The purpose of this paper is to elucidate the formation process of the Second Mujechi Moor at Mt. Jeongjok. For doing so, 1 analysed the formation process of valley which moor is located in, and the formation process of block field damming the valley: First, it is not a valley but a hollow which the...

The purpose of this paper is to elucidate the formation process of the Second Mujechi Moor at Mt. Jeongjok. For doing so, 1 analysed the formation process of valley which moor is located in, and the formation process of block field damming the valley: First, it is not a valley but a hollow which the Second Mujechi Moor located in. Hollow was formed as weathering bedrock weathered deeply along joints under warm and wet climatic conditions was denudated by rain wash. Second, the Second Mujechi Moor had been a marginal lake. Block stream developed during the last glacial period of Pleistocene, and it dammed the mouth of hollow. Afterwards sediments transported from slope filled the marginal lake, thus the lake changed to the moor where aquatic plants could grown. Third, the Second Mujechi Moor is drained and dried out by removal of matrix material from the block stream dam of the mouth of moor. For keeping moor's present conditions, we must control moor's drainage by filling open space in block stream with fine material.

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