. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Fig. 3. The wind-rose diagram (a), and distribution of maximum mean wave heights (b) of Yongxing Island SEDIMENTARY EACIES MODEL OF CORAL REEFS IN THE SOUTH CHINA SEA Our investigation of the various types of modern coral reefs in the South China Sea revealed consistent zonation pattern for the reef-derived sediments, which are controlled by similar hydrological, geomorphological, biological and sedimentational parameters in this region (Wang Guozhong et a] 1982, 1986). There are 7 main sedimentary facies, whi
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Fig. 3. The wind-rose diagram (a), and distribution of maximum mean wave heights (b) of Yongxing Island SEDIMENTARY EACIES MODEL OF CORAL REEFS IN THE SOUTH CHINA SEA Our investigation of the various types of modern coral reefs in the South China Sea revealed consistent zonation pattern for the reef-derived sediments, which are controlled by similar hydrological, geomorphological, biological and sedimentational parameters in this region (Wang Guozhong et a] 1982, 1986). There are 7 main sedimentary facies, which are described from the fore reef shoreward as follows (Fig. 4): The sub littoral sand-mud facies (1) is situated seaward of reefs with a smooth submarine morphology. Its upper limit starts at a depth of 10 m in the Hainan reef area and at more than 20 m in the Xisha reef area. The sediments consist mainly of clastic sand, silt, and muddy silt with patches of carbonate mud. In the Xisha reef area, this zone is almost entirely covered by white biogenic sand with scattered coral shingles, and contrasts with the Hainan and Weizhou reef areas, where the sediments consist of dark. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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