Low Energy Coast Near Cape Romano, Florida
Low Energy Coast Near Cape Romano, Florida
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佛罗里达州罗马诺角附近的低能量海岸
DOI：
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发表时间：
1963
期刊：
影响因子：
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通讯作者：
C. Holmes
中科院分区：
文献类型：
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作者：
W. F. Tanner;R. G. Evans;C. Holmes
摘要佛罗里达州西南部的罗马诺角-万岛地区大致位于石英砂沿岸漂流的南端。贝壳碎屑在近海很突出，而淤泥、粘土和泥炭物质在红树林屏障和泻湖地带很重要。因此，该地区似乎为研究现代沉积物的相变化提供了一个极好的机会。1960年6月，主要由一个五人小组进行现场调查，实验室工作于1961年完成。海岸线属于中低波能范围。在波浪能量占主导地位的地方(在向上漂流方向)，出现了石英砂海滩；在波浪能量很低而潮汐能量很重要的地方，红树林沼泽屏障将泻湖与墨西哥湾隔开。波能似乎正在向东南方向减弱。能量的减少和潮流环流的结合，在罗马诺角附近形成了一个石英砂岛滩复合体。波浪折射似乎使浅滩区域呈现出现在的样子。该地区的沉积物主要是海滩和墨西哥湾海底的石英砂和贝壳碎屑，以及红树林屏障和泻湖地带的细粒沙、粉砂、粘土、泥炭物质和牡蛎棒。通过对微型动物(有孔虫和介形虫)的分析，可以将样本分为四个组：沼泽河(大陆)、泻湖、红树林-岛和开阔海湾。悬浮在水中的有机物质和其他细粒物质阻碍了对沉积物表面标记的系统研究。
ABSTRACT The Cape Romano-Ten Thousand Islands area of southwestern Florida is roughly at the southern end of quartz sand littoral drift. Shell hash is prominent offshore, and silt, clay, and peaty materials are important in the mangrove-barrier-and-lagoon strip. The area therefore appeared to offer an excellent opportunity for a study of changes in facies of modern sediments. Field investigation was carried out primarily by a five-man team in June, 1960, and laboratory work was completed in 1961. The shoreline is one of low-to-moderate wave energy. where wave energy is dominant (in the up-drift direction), quartz sand beaches appear; where wave energy is very low and tidal energy is important, a mangrove swamp barrier separates the lagoon from the Gulf of Mexico. Wave energy seems to be decreasing toward the southeast. The combination of decreasing energy and tidal current circulation produces a quartz sand island-and-shoal complex in the vicinity of Cape Romano. Wave refraction appears to have given the shoal area its present form. The sediments of the area are essentially quartz sand and shell hash along the beaches and on the Gulf floor, and fine-grained sand, silt, clay, peaty material, and oyster bars in the mangrove-barrier-and-lagoon strip. Analysis of the microfauna (foraminifera and ostracodes) permitted a separation of samples into four suites: marsh-river (mainland), lagoon, mangrove-island, and open Gulf. Organic and other fine-grained matter suspended in the water prevented a systematic study of sediment surface markings.