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87:6287 Processes of glacimarine sedimentation
956
D. Submarine Geology and Geophysics
shelf currents, and sea level changes. Rivers dominate the supply of sediment to the shore and help control erosional/accretionary trends. The size and instability of the Yellow River and the Yangtze accentuate their impact on coastal development. Since the 1855 migration of the Yellow River from the Yellow Sea into the Bohai Sea, the north Jiangsu coast has eroded ~ 17 km inland, while the new delta has grown ~ 2 8 km into the Bohai Sea. The coastal classification of Wang (1980) divides the Chinese coastline into four major sectors ranging from the river-dominated Bohai Sea sector to the wavedominated Guangdong/Guanxi sector. This classification and major studies of coastal processes in China are summarized. Mar. Geomorphol. and Sedimentol. Lab., Nanjing Univ., Nanjing, People's Republic of China. 87:6284 Zimmerman, M.S. and H.J. Bokuniewicz, 1987. Multi-year beach response along the south shore of Long Island, New York. Shore Beach, 55(2):38. Mar. Sci. Res. Center, SUNY, Stony Brook, New York, NY, USA.
OLR (1987) 34 { I l )
the epicenters of large shallow earthquakes in 1946, 1965, 1971, and 1973. The accumulation of emergence, its persistence, limited geographic extent of each event, and occurrence in areas of rapid Holocene uplift suggest that the causes of the uplift are tectonic. In central Vanuatu, contemporary coseismic vertical deformation, Holocene uplift, and topography have remarkably similar patterns, suggesting that mechanisms and processes causing vertical deformation have varied little over the last 106 yr. Apparently the topography, structure, and seismotectonics are controlled by subduction of the d'Entrecasteaux Ridge. Previous studies of reef terraces indicating the existence of at least four seismotectonic arc segments along the Santo-Malekula interval of the arc are supported by the present study. Inst. for Geophys., Univ. of Texas, 4920 North tH 35, Austin, TX 78751, USA.
DI20. Sedimentary processes (deposition, diagenesis, etc.) 87:6287 Dowdeswell, J.A., 1987. Processes of glacimarine sedimentation. Leading Edge, 6(6):52-90.
D80. Reefs and atolls 87:6285 Digerfeldt, G. and M.D. Hendry, 1987. An 8000 year Holocene sea-level record from Jamaica. Implications for interpretation of Caribbean reef and coastal history. Coral Reefs, 5(4):165-169.
Extensive coring, stratigraphic study, and radiocarbon dating of 55 samples were used to construct two sea level curves, covering the last 8000 yr of mid-to-Late Holocene sea surface movements around Jamaica in an investigation of coastal wetlands at Black River and Negril on the western coast of Jamaica. The curves are the first for islands on the Caribbean Plate. Lab. of Quaternary Geol., Univ. of Lund, Tornavagen 13, S-223 63 Lund, Sweden. (hbf) 87:6286 Taylor, F.W., Cliff Frohlich, Jean Lecolle and Manfred Strecker, 1987. Analysis of partially emerged corals and reef terraces in the central Vanuatu Arc. Comparison of contemporary coseismic and nonseismic with Quaternary vertical movements. J. geophys. Res., 92(B6):49054933.
On the basis of annual aragonitic growth bands in coral skeletons four major coral emergence events are identified as coseismic uplifts that occurred near
Current information on the processes which have resulted in the deposition of glacigenic material on the seafloor is reviewed, describing sources of sediment, debris transport and deposition, the reworking of deposits, and examples of the sedimentation patterns that result. Interaction between ice masses and marine waters and the reworking and redistribution of seafloor deposits are emphasized. Recent improvements and innovations in field equipment and areas where our knowledge of the interactions of processes are relatively limited are also indicated. Includes ca. 130 references. Dept. of Geogr., Univ. Coll. of Wales, Aberystwyth, UK. (hbf) 87:6288 Elderfield, H. and E.R. Sholkovitz, 1987. Rare earth elements in the pore waters of reducing nearshore sediments. Earth planet. Sci. Lefts, 82(3-4):280288. REE are mobile during early diagenesis in reducing nearshore sediments of Buzzards Bay, leading to greatly enhanced concentrations in pore waters, about 10-50 times local seawater values. Two principal diagenetic reactions have been identified. Preferential Ce enrichment and preferential heavy REE enrichment in the pore waters is associated with redox cycling of Fe and Mn within the upper few centimeters of the sediment. Release of REE,
D. Submarine Geology and Geophysics
shelf currents, and sea level changes. Rivers dominate the supply of sediment to the shore and help control erosional/accretionary trends. The size and instability of the Yellow River and the Yangtze accentuate their impact on coastal development. Since the 1855 migration of the Yellow River from the Yellow Sea into the Bohai Sea, the north Jiangsu coast has eroded ~ 17 km inland, while the new delta has grown ~ 2 8 km into the Bohai Sea. The coastal classification of Wang (1980) divides the Chinese coastline into four major sectors ranging from the river-dominated Bohai Sea sector to the wavedominated Guangdong/Guanxi sector. This classification and major studies of coastal processes in China are summarized. Mar. Geomorphol. and Sedimentol. Lab., Nanjing Univ., Nanjing, People's Republic of China. 87:6284 Zimmerman, M.S. and H.J. Bokuniewicz, 1987. Multi-year beach response along the south shore of Long Island, New York. Shore Beach, 55(2):38. Mar. Sci. Res. Center, SUNY, Stony Brook, New York, NY, USA.
OLR (1987) 34 { I l )
the epicenters of large shallow earthquakes in 1946, 1965, 1971, and 1973. The accumulation of emergence, its persistence, limited geographic extent of each event, and occurrence in areas of rapid Holocene uplift suggest that the causes of the uplift are tectonic. In central Vanuatu, contemporary coseismic vertical deformation, Holocene uplift, and topography have remarkably similar patterns, suggesting that mechanisms and processes causing vertical deformation have varied little over the last 106 yr. Apparently the topography, structure, and seismotectonics are controlled by subduction of the d'Entrecasteaux Ridge. Previous studies of reef terraces indicating the existence of at least four seismotectonic arc segments along the Santo-Malekula interval of the arc are supported by the present study. Inst. for Geophys., Univ. of Texas, 4920 North tH 35, Austin, TX 78751, USA.
DI20. Sedimentary processes (deposition, diagenesis, etc.) 87:6287 Dowdeswell, J.A., 1987. Processes of glacimarine sedimentation. Leading Edge, 6(6):52-90.
D80. Reefs and atolls 87:6285 Digerfeldt, G. and M.D. Hendry, 1987. An 8000 year Holocene sea-level record from Jamaica. Implications for interpretation of Caribbean reef and coastal history. Coral Reefs, 5(4):165-169.
Extensive coring, stratigraphic study, and radiocarbon dating of 55 samples were used to construct two sea level curves, covering the last 8000 yr of mid-to-Late Holocene sea surface movements around Jamaica in an investigation of coastal wetlands at Black River and Negril on the western coast of Jamaica. The curves are the first for islands on the Caribbean Plate. Lab. of Quaternary Geol., Univ. of Lund, Tornavagen 13, S-223 63 Lund, Sweden. (hbf) 87:6286 Taylor, F.W., Cliff Frohlich, Jean Lecolle and Manfred Strecker, 1987. Analysis of partially emerged corals and reef terraces in the central Vanuatu Arc. Comparison of contemporary coseismic and nonseismic with Quaternary vertical movements. J. geophys. Res., 92(B6):49054933.
On the basis of annual aragonitic growth bands in coral skeletons four major coral emergence events are identified as coseismic uplifts that occurred near
Current information on the processes which have resulted in the deposition of glacigenic material on the seafloor is reviewed, describing sources of sediment, debris transport and deposition, the reworking of deposits, and examples of the sedimentation patterns that result. Interaction between ice masses and marine waters and the reworking and redistribution of seafloor deposits are emphasized. Recent improvements and innovations in field equipment and areas where our knowledge of the interactions of processes are relatively limited are also indicated. Includes ca. 130 references. Dept. of Geogr., Univ. Coll. of Wales, Aberystwyth, UK. (hbf) 87:6288 Elderfield, H. and E.R. Sholkovitz, 1987. Rare earth elements in the pore waters of reducing nearshore sediments. Earth planet. Sci. Lefts, 82(3-4):280288. REE are mobile during early diagenesis in reducing nearshore sediments of Buzzards Bay, leading to greatly enhanced concentrations in pore waters, about 10-50 times local seawater values. Two principal diagenetic reactions have been identified. Preferential Ce enrichment and preferential heavy REE enrichment in the pore waters is associated with redox cycling of Fe and Mn within the upper few centimeters of the sediment. Release of REE,