Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil

作     者：Soraia G.Bauermann Paulo C.P.Neves Marleni Marques-Toigo Abdul R.Ashraf 

作者机构：Laboratory of Palynology-Lutheran University Canoas/RSCEP 92.420-280Brazil Institute of Geosciences Federal University of Rio Grande do SulCEP 91501-970Brazil (in memoriam) Institute of Geosciences University of TuebingenTuebingen D-72076Germany 

出 版 物：《Journal of Geoscientific Research in Northeast Asia》 (东北亚地学研究（英文版）)

年 卷 期：2005年第8卷第1期

页      面：98-103页

学科分类：070905[理学-第四纪地质学] 0709[理学-地质学] 07[理学] 

主　　题：paleoenvironmental lagoonal deposits holocen transgression 

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.