| Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil |
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| 作者姓名： | Soraia G.Bauermann Paulo C.P.Neves Marleni Marques-Toigo Abdul R.Ashraf |
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| 作者单位： | Laboratory of Palynology-Lutheran University Canoas/RS CEP 92.420-280，Brazil，Laboratory of Palynology-Lutheran University Canoas/RS，CEP 92.420-280，Brazil，Institute of Geosciences Federal University of Rio Grande do Sul，CEP 91501-970，Brazil (in memoriam)，Institute of Geosciences University of Tuebingen，Tuebingen D-72076，Germany |
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| 摘 要： | The Domingos Petrolini Swamp, located on the Southern Coastal Plain of Rio Grande do Sul, near the town of Rio Grande, constitutes an ample holocene lagoonal deposit. Events related to the holocene transgression and their diverse phases of glacial-eustatic ocillations were found through palynological analysis. Bases on these palynological data, four distinct phases to the paleoenvironmental evolution of the ecosystem were identified. It has also shown a transgressive restricted marine sequence on the base , which suggests the existence of a coastal brackish lagoon or a marisme type of environment. Later, there was a gradation for continentality conditions along with a scarce pollinical record. The third phase is characterized by the presence of marine components and halophyte vegetation, showing another transgressive event in that place. Lastly, the end of direct marine influence over the swamp was recorded and also the vegetation development as it appears these days.
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Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil |
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| Soraia G.Bauermann,Paulo C.P.Neves,Marleni Marques-Toigo,Abdul R.Ashraf.Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil[J].Journal of Geoscientific Research in Northeast Asia,2005(Z1). |
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| Authors: | Soraia G Bauermann Paulo C P Neves Marleni Marques-Toigo Abdul R Ashraf Laboratory of Palynology - Lutheran University Canous/RS CEP - Brazil Institute of Geosciences Federal University of Rio Grande do Sul CEP - Brazil |
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| Institution: | in memoriam |
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| Abstract: | The Domingos Petrolini Swamp, located on the Southern Coastal Plain of Rio Grande do Sul, near the town of Rio Grande, constitutes an ample holocene lagoonal deposit. Events related to the holocene transgression and their diverse phases of glacial-eustatic ocillations were found through palynological analysis. Bases on these palynological data, four distinct phases to the paleoenvironmental evolution of the ecosystem were identified. It has also shown a transgressive restricted marine sequence on the base , which suggests the existence of a coastal brackish lagoon or a marisme type of environment. Later, there was a gradation for continentality conditions along with a scarce pollinical record. The third phase is characterized by the presence of marine components and halophyte vegetation, showing another transgressive event in that place. Lastly, the end of direct marine influence over the swamp was recorded and also the vegetation development as it appears these days. |
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| Keywords: | paleoenvironmental lagoonal deposits holocen transgression |
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