한국지역지리학회지 (Journal of the Korean association of regional geographers)
- 제18권3호
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- Pages.253-267
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- 2012
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- 1226-7392(pISSN)
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- 2586-1468(eISSN)
무등산 암설지형의 유형과 특징
Type and Characteristics of Debris Landform in Mt. Mudeung
- Oh, Jong-Joo (Department of Geography Education, Korea University) ;
- Park, Seoung-Phill (Department of Geography, College of Social Sciences, Chonnam National University) ;
- Seong, Yeong-Bae (Department of Geography Education, Korea University)
- 투고 : 2012.05.17
- 심사 : 2012.08.19
- 발행 : 2012.08.31
초록
본 연구는 무등산에 분포하는 암괴류의 유형과 특징을 파악하고자 하였다. 무등산의 암설지형은 암괴노출형, 노출혼합형, 거력잠재형, 기후단구 노출혼합형으로 분류할 수 있으며, 암괴노출형의 대부분은 암괴류의 형태를 보인다. 암설지대 암괴의 공급은 암질에 따라 다른 양상을 보이고 있다. 안산암질이 우세한 암설은 암설지대 상부의 주상절리 또는 단애에서 암괴의 이동이 있었을 것으로 판단되고. 화강암질은 심층풍화된 암괴가 사면이동하였던 것으로 추정된다. 암괴의 이동방식은 암괴의 낙하보다는 미끄러짐이 우세했던 것으로 추론된다. 그 이유는 단애와 암설지대 사이에
The study looked into the type and characteristics of debris landforms in Mt. Mudeung. By focusing on the representative area, we aimed to categorize the debris landforms based on the morphologic and genetic characteristcis. The types of debris areas in Mt. Mudeung can be divided into the exposed debris type, mixed type of matrix, and the boulder-hidden type. Supply of block in the debris slope area displays different features depending on types of rocks. For the stony slopes of andesite, the block must be moved from the columnar joint or cliff in the upper part. The andesite debris slopes display dominant edge shape while displaying no round shape. The granite stony slopes display dominant round shape and the present exposed slope was assumed to be formed as the core stone which was deep weathered moved along slope during the periglacial era and the matrix was removed after post-glacial era. The movements of blocks are assumed to be caused by solifluction process. The joint area where granite and andesite areas meet, granite is located beneath andesite area, and this implies that blocks were actively freezing and creeping by solifluction and freezing and thawing at that time. It can be assumes that the granite matrix formed plain slope and then andesite boulder covered up the slope. Currently, the blocks in the stony slopes of Mt. Mudeung shows almost no mobility and the stony slopes created under periglacial climate can be considered to be fossil landform.
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