A multi‐proxy study of Umbric Ferralsols genesis in a high‐mountain environment in Rio de Janeiro state

The formation of strongly weathered soils of the tropics (Ferralsols) with high carbon stocks (thick A‐horizon/umbric horizon) is still not understood. In order to contribute to the understanding of the formation of Umbric Ferralsols, we studied these soils in the highlands of Rio de Janeiro state (...

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Veröffentlicht in:	Earth surface processes and landforms 2023-03, Vol.48 (4), p.721-734
Hauptverfasser:	Pereira, Marcos Gervasio, Silva, Rafael Cipriano, Pinheiro Junior, Carlos Roberto, Silva Neto, Eduardo Carvalho, Fontana, Ademir, Schiavo, Jolimar Antonio, Carvalho Maranhão, Deyvid Diego, Azevedo, Antônio Carlos, Pacheco, Anderson Almeida
Format:	Artikel
Sprache:	eng
Schlagworte:	Accumulation Aluminum oxide Bayer process Bioturbation Cation exchange Cation exchanging Cations Charcoal Climatic conditions Environmental conditions Exchange capacity ferralitization Gibbsite Holocene Horizon Humification Isotope composition Kaolinite Mountain environments organic carbon Organic matter paleoenvironment evolution pedogenesis Photosynthesis Plants (botany) Silica Silicon dioxide Soil Soil analysis Soil chemistry Soil formation Soil morphology Soils Stocks Tropical environments Vegetation Weathering
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Zusammenfassung:	The formation of strongly weathered soils of the tropics (Ferralsols) with high carbon stocks (thick A‐horizon/umbric horizon) is still not understood. In order to contribute to the understanding of the formation of Umbric Ferralsols, we studied these soils in the highlands of Rio de Janeiro state (Brazil) from various perspectives. We analysed soil morphology, micromorphology, physical and chemical soil attributes, soil phytolith assemblages, and δ13C isotopic composition in a multi‐proxy study. The profiles presented ferralic horizons with SiO2/Al2O3 ratio (ki index)
ISSN:	0197-9337 1096-9837
DOI:	10.1002/esp.5513