Sedimentary Patterns and Evolution of Coastal Environments during the Holocene in Central Belize, Central America
Sedimentary Patterns and Evolution of Coastal Environments during the Holocene in Central Belize, Central America
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DOI：
10.2112/jcoastres-d-14-00093.1
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发表时间：
2015-07-01
影响因子：
--
通讯作者：
Gischler, Eberhard
中科院分区：
文献类型：
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作者：
Adomat, Friederike;Gischler, Eberhard
沿海泻湖、沼泽和沼泽覆盖了伯利兹海岸的大部分地区。在伯利兹中部海岸沿着5个断面收集了沿着的26个沉积物岩心，并从这些岩心中获得了58个放射性碳年代测定结果，揭示了沿海沉积物沉积的地层学细节。大陆和沿海泻湖形成的海洋淹没开始于距今7980年（cal BP）和>5547 cal BP之间。作为对全新世海侵期间海平面上升的响应，岩相向海岸退化，如边缘海洋上覆的半咸水软体动物群所示。由于海平面停滞，全新世晚期的相沉积的证据在很大程度上缺乏。泻湖演替中向陆地变薄的砂床、间断和海洋动物群的出现是事件（过冲）沉积的迹象。发现的沉积物大部分为全新世沉积物（
Coastal lagoons, marshes, and swamps cover large areas of the Belize coast. Twenty-six sediment cores collected along five transects along the central Belize coast and 58 radiocarbon dates from these cores reveal stratigraphic details of coastal sediment deposition. Marine inundation of the mainland and coastal lagoon formation started between 7980 calendar years before present (cal BP) and >5547 cal BP. As a response to sea-level rise during the Holocene transgression, facies retrograded toward the coast, as seen in marginal marine overlying brackish mollusk faunas. Evidence for late Holocene progradation of facies due to sea-level stagnation is largely lacking. The occurrence of landward thinning sand beds, hiatuses, and marine fauna in lagoonal successions are indications of event (overwash) sedimentation. Sediments recovered are largely of Holocene age (