Foraminiferal and Sedimentary Record of Late Holocene Barrier Island Evolution, Pea Island, North Carolina: The Role of Storm Overwash, Inlet Processes, and Anthropogenic Modification
Foraminiferal and Sedimentary Record of Late Holocene Barrier Island Evolution, Pea Island, North Carolina: The Role of Storm Overwash, Inlet Processes, and Anthropogenic Modification
复制标题
北卡罗来纳州豌豆岛全新世晚期障壁岛演化的有孔虫和沉积记录：风暴淹没、入口过程和人为改变的作用
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
David J. Vance
中科院分区：
文献类型：
--
作者：
S. Culver;D. Ames;D. Corbett;D. Mallinson;S. Riggs;Christopher;G. Smith;David J. Vance
有孔虫和沉积资料，辅以地球化学测年和探地雷达样带，表明位于北卡罗来纳州罗丹特北部Pea岛国家野生动物保护区的障壁岛，至少有1000年的时间是由入口和冲过作用共同主导的。几个震核的地层记录并没有保存每一个，甚至没有保存许多次冲过事件，而是以三到四个向上的细化序列为特征。后三层由上冲砂或砾石组成，上面覆盖着各种细粒度的河口、进水口和沼泽沉积物。20世纪30年代末，由于建造了人工屏障沙丘山脊，广泛种植了草和灌木，以及1953年12号公路的建设，外滩的这一段的动态特性被减弱了。随后，道路和屏障沙丘岭被重建，并在风暴事件后多次搬迁。
Abstract Foraminiferal and sedimentary data, supplemented with geochemical dating and ground-penetrating radar transects, show that the barrier island at Pea Island National Wildlife Refuge just north of Rodanthe, North Carolina, has been dominated by a combination of inlet and overwash processes for at least 1000 years. The stratigraphic record of several vibracores does not preserve every, or even many, overwash events but, instead, is characterized by three to four fining-upward sequences. The last three commence with overwash sand or gravel that is overlain by a variety of finer-grained estuarine, inlet, and marsh deposits. The dynamic nature of this segment of the Outer Banks was muted in the late 1930s by construction of artificial barrier dune ridges, extensive planting of grass and shrubs, and construction of Highway 12 in 1953. Subsequently, the road and barrier dune ridge were rebuilt and relocated several times following storm events.