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The Morphological Change by Slope Erosional Processes in the Dokdo Seamount  

Kang, Ji-Hyun (National Institute of Environmental Research)
Sung, Hyo-Hyun (Dept. of Social Studies, Ewha Womans University)
Park, Chan-Hong (Korea Ocean Research & Development Institute)
Kim, Chang-Hwan (Korea Ocean Research & Development Institute)
Jeong, Eui-Young (Korea Ocean Research & Development Institute)
Publication Information
Journal of the Korean Geographical Society / v.43, no.6, 2008 , pp. 791-807 More about this Journal
Abstract
The purpose of this study is to analyze landform characteristics and geomorphic processes in Dokdo seamount. For geomorphic analysis, bathymetry data were collected by multi-beam echosounder and the seismic survey was also conducted. Through the detailed analysis of depth, slope, aspect and erosional landform, Dokdo Seamount is characterized by a flat or gently sloping top of $2^{\circ}$ or less and seamount slope with $14{\sim}40^{\circ}$ gradient. There are protrusion of landform around the Dokdo on top of the Dokdo seamount. It is inferred that the features are formed by collapsed debris deposits or remained bedrocks by differential erosion in the past. The massmovement topography including slump and slide is shown on seamount slope with $14{\sim}40^{\circ}$ gradient. In addition, gullies with various length are developed on the Dokdo seamount slope. Slope erosional processes occur more actively along the submarine gullies on the Dokdo seamount. It is inferred that the massmovement processes on the slope of Dokdo seamount are related to earthquake activities and evolution of submarine volcano. Consequently, slope of the Dokdo seamount has retreated by erosional processes of mass-movement and submarine gullies.
Keywords
Dokdo seamount; guyot; slope erosional processes; massmovement; submarine gully;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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