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- W2372714169 abstract "Red earth in South China is commonly referred to as one of the most important geological records for reconstructing paleoclimatic change in the lower latitude. Here this paper presents the preliminary results of phytolith and pollen analyses of red earth profile of Jiujiang City, Jiangxi Province. This red earth section is about 18m thick (29°40′N, 116°01′E), and consists of two pedogenic units. The upper part is a layer of yellowish silty clay, while the lower part a layer of red clay with yellow and white worm shaped veins. 33 soil samples were collected from the red earth section for phytolith and pollen investigations. Phytolith and pollen analyses indicate the vegetation during the period of formation of red earth was characterized by subtropical evergreen broad leaved forest. The main reasons that the phytolith was poorly preserved may be related to high values of aluminum and iron oxides, and “A” horizons of paleosoil eroded. The investigation also shows that the preservation of phytolith in the red earth was correlated with the variations of geochemical parameters, i. e. Grain size, CIA, TOC. Phytoliths in the red earth were mainly from the grass. The subtropical tree phytoliths were less resistant to dissolution. The grass phytolith amount increased down section. The results of phytolith analysis, associated with the geochemical parameters, reveal a deterioration of climate over central China since late Pleistocene, and this is probably related to the drying process reflected by the dust flux records of the loess deposits. The occurrence of “A” horizons of paleosoil, at the depth of 5m, 3.5m in the red earth section respectively, implies that the red earth was not only the production of eluvial weathering, but was accompanied with an accelerated accumulation in dust materials as well." @default.
- W2372714169 created "2016-06-24" @default.
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- W2372714169 date "2001-01-01" @default.
- W2372714169 modified "2023-09-25" @default.
- W2372714169 title "PHYTOLITH AND POLLEN RECORDS OF QUATERNARY RED EARTH IN JIUJIANG CITY, JIANGXI PROVINCE" @default.
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