摘要
珊瑚礁向海坡是珊瑚礁地貌中很具特色的地貌单元之一,特别是上部向海坡发育的浅水平台、脊-槽沟系反映了构造运动、海平面升降以及水动力作用的强弱.根据实测剖面资料,发现永暑礁上部向海坡地形呈台阶状,普遍发育-6～-8m,-35～-38m两级浅水平台,它们具有古海平面的指向意义;东北和西南礁缘普遍发育了脊-槽沟地貌体系,反映了南沙群岛的季风气候特点和波浪作用的强弱.锚地大都发育在西南向海坡.本文对永暑礁上部向海坡的地貌形态特征进行了研究,并对其成因进行了探讨.
The seaward slope of coral reef is one of the most distinguishing geomorphic units, specially the shallow platform and spur and groove systems developed in the upper seaward slope which reflect the tectonic movement, sea-level changes and the strength of hydrodynamics. According to the measured data, we find that in Yongshu Reef there are two shallow platforms in- 6～ - 8m and -35～- 38m which have index significance to the ancient sea-level. The spur- groove systems develope on the northeast and southwest reef fringes represent the monsoon climate and wave action. Anchorage usually develops in the Southwest seaward slope. This paper studies the geomorphic features of the upper seaward slope of Yongshu Reef and also discusses the causes of formation of geomorphology.
出处
《海洋通报》
CAS
CSCD
北大核心
1999年第3期49-54,共6页
Marine Science Bulletin
基金
九五国家重大科技专项南沙综考项目资助(97-926-03-02)
