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首页> 外文会议>Convention of the Gulf Coast Association of Geological Societies American Association of Petroleum Geologists Sectional Meeting >Imaging the Internal Movements of Galveston Island and Bolivar Peninsula with Ground Penetrating Radar
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Imaging the Internal Movements of Galveston Island and Bolivar Peninsula with Ground Penetrating Radar

机译：成像加尔维斯顿岛和玻利瓦尔半岛的内部运动与地面渗透雷达

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This paper focuses on barrier island migration and growth direction is studied through the use of ground penetrating radar. In general, all barrier islands are located along coastlines separated from the mainland by a sound body of water, such as, a bay or lagoon. However, not all barrier islands are created equally. There are several theories that suggest barrier island growth and migration are a result of emerged submarine sandbars, spit growth followed by breached inlets or submerged beach-ridges. These hypotheses have been tested for nearly a century; the conclusion is no one theory is exclusive to barrier island development. The theory of emerged submarine sandbars having formed a barrier island assumes the waves come to shore, nearly perpendicular, while picking up loose sediments along the way that are deposited on the bars. The bars eventually emerge above the sea's surface creating the subaerial landform. The next theory, spit growth followed by breached inlets, suggests that a spit formed from land and lengthened out along the mainland from longshore currents over a period of time eventually breached by storm-induced tides forming tidal inlets. The last barrier formation theory involves a submerged dune ridge along the coast, which emerges when sea -level rises. After interpretation of the data for Bolivar and Galveston Island the two possible theories of interest are the emergence of submarine bars or submerged duneridges. The theory of spit formation is not supported because Bolivar Peninsula (~1.7 ka) is much younger than Galveston Island (-5.3 ka), so Bolivar formed after Galveston was already established.
机译：本文通过使用地面穿透雷达研究了屏障岛迁移和生长方向。一般而言，所有障碍群岛都沿着海岸线，由水上的水分分开，例如海湾或泻湖。但是，并非所有障碍群岛都是平等的。有几种理论表明障碍岛增长和移民是出现的潜水艇砂银，吐流量，然后遭到破坏的入口或淹没的海滩脊。这些假设已经过近一个世纪;结论是没有一个理论是障碍岛屿发展的独家。形成一个障碍岛的出现的潜水艇砂银的理论假设海浪沿着岸边，几乎垂直，同时沿着沉积在条形上的方式拾取松散的沉积物。酒吧最终出现在海面上方，从而产生了基础地貌。下一个理论，吐流量随后被破坏的入口，表明，从陆地形成的唾液并在一段时间内从大型电流延长大陆，最终被暴风雨诱导的潮汐形成潮汐入口。最后一个屏障形成理论涉及沿着海岸的淹没沙丘山脊，当海上升起时出现。在解释玻利瓦尔和加尔维斯顿岛的数据之后，感兴趣的两种可能的理论是潜艇的出现或潜水器的出现。不支持吐痰地层理论，因为玻利亚尔半岛（〜1.7 ka）比加尔维斯顿岛（-5.3 ka）更年轻，因此已经建立了加尔维森后形成的玻利亚尔。

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