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남해 Sand ridge 퇴적물의 퇴적상과 물리적 특성
천희정(Hee Jeong Chon),서영교(Yong Kyo Seo),김대철(Dae Choul Kim),김정창(Jeng Chang Kim),(Jock Keene) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.5
Sand ridges in the South Sea of Korea have been investigated to reveal the surface morphology and vortical variation in sediment physical property, Both field and laboratory methods such as high resolution subbottom profiling, side scan sonar, and physical property and sediment textural study on cored sediments were employed. Asymmetric sand waves are fecund on the ridge. No prominent difference in the sediment was recorded throughout the ridge area. Sediment sorting is generally poor due to interbedded mud. Average compressional wave velocity is 1753 m/sec for the sand dominated core section. Most of cores show two prominent facies : facies A and B. Facies A is defined as modern mud sediment and B is dominated by relict sand. Facies B is characterized by gravel, sand, and shell fragment. It is suggester that the Facies B was developed in transgressive environment by tide and sporadic high energy events.