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Facies analysis of the Codó Formation (Late Aptian) in the Grajaú Area, Southern São Luís-Grajaú Basin 42
Rossetti,Dilce F.; Paz,Jackson D.S.; Góes,Ana M..
Facies descriptions of the Codó Formation in the Grajaú area are provided for the first time, and its sedimentary characteristics compared to those from the Codó area to allow paleoenvironmental reconstructions. Deposits in the Grajaú area include evaporites, limestones and argillites bearing features indicative of a shallow, low energy, subaqueous, saline environment exposed to meteoric and/or capillary conditions. Flooding-evaporative concentration-desiccation cycles suggest a saline pan complex surrounded by extensive evaporitic mudflats. The location of the system, whether coastal or inland, is a matter open for debate. However, the later hypothesis is favored considering: 1. Sr isotopic data, with values higher than those expected for Late Aptian...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Evaporite; Paleoenvironment reconstruction; Lacustrine; Late Aptian; Facies analysis; São Luís-Grajaú Basin.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000400012
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Geochemical methods to infer landscape response to Quaternary climate change and land use in depositional archives: A review 5
Francke, Alexander; Holtvoeth, Jens; Codilean, Alexandru; Lacey, Jack H.; Bayon, Germain; Dosseto, Anthony.
Understanding and quantifying the processes and geochemical cycles associated with catchment erosion, the development of soils and weathering horizons, and terrestrial habitat change beyond the scales of modern observations remain challenging. Such research, however, has become increasingly important to help predict future landscape change in light of increasing land use and rapid global warming. We herein review organic and inorganic geochemical tools applied to depositional archives to better understand various aspects of landscape evolution on geological time scales. We highlight the potentials and limitations of inorganic geochemical analytical methods, such as major element geochemistry, metal and radiogenic isotopes, and in-situ cosmogenic nuclides,...
Tipo: Text Palavras-chave: Quaternary landscape evolution; Catchment erosion; Terrestrial habitat change; Land use; Fluvial; Lacustrine; Inorganic geochemistry; Organic geochemistry; Radiogenic isotopes; Metal isotopes; Uranium isotopes; Cosmogenic nuclides.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00632/74383/74084.pdf
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