Late Quaternary in a South Atlantic estuarine system: Stratigraphic and paleontologic indicators of coastal evolution

Salvador Aliotta; Silvia S. Ginsberg; Jorge O. Spagnuolo; Ester Farinati; Dario Giagante; Laura G.Vecchi

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Late Quaternary in a South Atlantic estuarine system: Stratigraphic and paleontologic indicators of coastal evolution

机译：南大西洋河口系统中的第四纪晚期：沿海演化的地层学和古生物学指示

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The decisive influence of Late Quaternary sea level changes on the geological evolution of the coastal plain and adjacent continental shelf around the world has long been recognized. Coastal environments evolve actively during transgressive-regressive cyeles whose development depends on sea level and sediment supply variations. The interaction of these variables was key to the current morphological and sedimentological configuration of coastal regions. Particularly, the estuarine system of Bahia Bianca (Argentina) presents various types of deposits and marine fossil accumulations, such as paleochannels in the subbottom, sand-shell ridges and extensive layers with fossils in life position. These features are important geological indicators, because its analysis allows us to define different paleoenvironmental conditions that prevailed during the coastal evolutionary process.

机译：早已认识到第四纪晚期海平面变化对全世界沿海平原和邻近大陆架的地质演化的决定性影响。在海侵-海退期间，沿海环境会积极发展，其发展取决于海平面和沉积物供应的变化。这些变量的相互作用是当前沿海地区形态和沉积构造的关键。特别是，巴伊亚比安卡河（阿根廷）的河口系统呈现出各种类型的沉积物和海洋化石堆积物，例如，下层的古河道，沙壳山脊和生活化石的广阔地层。这些特征是重要的地质指标，因为其分析使我们能够定义沿海演化过程中普遍存在的不同古环境条件。

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《Journal of South American earth sciences》 |2013年第8期|194-208|共15页
作者
Salvador Aliotta; Silvia S. Ginsberg; Jorge O. Spagnuolo; Ester Farinati; Dario Giagante; Laura G.Vecchi;
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作者单位

Institute Argentino de Oceanografia, CONICET. La Carrindanga km 7, 8000 Bahia Bianca, Argentina,Departamento de Ceologia, UNS, San Juan 672, 8000 Bahia Bianca, Argentina;

Institute Argentino de Oceanografia, CONICET. La Carrindanga km 7, 8000 Bahia Bianca, Argentina,Departamento de Ingenieria Civil, UTN, FRBB, 11 de Abril 461, 8000 Bahia Bianca, Argentina;

Institute Argentino de Oceanografia, CONICET. La Carrindanga km 7, 8000 Bahia Bianca, Argentina,Departamento de Ceologia, UNS, San Juan 672, 8000 Bahia Bianca, Argentina;

Departamento de Ceologia, UNS, San Juan 672, 8000 Bahia Bianca, Argentina;

Institute Argentino de Oceanografia, CONICET. La Carrindanga km 7, 8000 Bahia Bianca, Argentina;

Departamento de Ceologia, UNS, San Juan 672, 8000 Bahia Bianca, Argentina,Departamento de Ingenieria Civil, UTN, FRBB, 11 de Abril 461, 8000 Bahia Bianca, Argentina;

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Geochemistry; A-type granites; Charnockites; Quartz mangerites and gabbros; SW Amazonian Craton; Jamari terrain;

机译：地球化学;A型花岗岩;Charnockites;石英man和辉长岩;SW Amazonian Craton;哈马里地形;

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Late Quaternary in a South Atlantic estuarine system: Stratigraphic and paleontologic indicators of coastal evolution

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