2026-08-16T05:28:59Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/604352024-07-15T18:25:53Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Alonso Zarza, Ana María
author
Wright, V.P.
author
Calvo Sorando, José Pedro
author
García del Cura, M. Ángeles
2023-06-20T20:32:38Z
2023-06-20T20:32:38Z
1992
0037-0746
10.1111/j.1365-3091.1992.tb01021.x
https://hdl.handle.net/20.500.14352/60435
https://onlinelibrary.wiley.com/journal/13653091
The Miocene alluvial-lacustrine sequences of the Madrid Basin, Spain, formed in highly varied landscapes. The presence of various types of palaeosols allows assessment of the effects of local and external factors onsedimentation, pedogenesis and geomorphological development. In the northern, more arid, tectonicallyactive arca, soils were weakly developed in aggrading alluvial fans, dominated by mass flows. reflecting high sedimentation rates. In more distal parts of the fans and in playa lakes calcretes and dolocretes developed: the former were associated with Mg-poor fan sediments whitc: the latter formed on Mg-rich lake clays exposed during minar lake lowstands. The nonh-east part of the basin had a less arid climate. Alluvial fans in this area were dominated by stream Aood deposits, sourced by carbonate terrains. Floodplain and freshwater lakc deposits formed in distal areas. The high local supply of calcium carbonate may have contributed to the preferential developmenl on calcretes on the fans. Both the fan and floodplain palaeosols exhibit pedofacies relationships and more mature soils developed in settings more distant from the sediment sources. Palaeosols also developed on pond and lake margin carbonates, and led to the formation of palustrine limestones. The spatial distributions and stratigraphies of palaeosols in the Madrid Basin alluvial fans suggest that soil formation was controlled by local factors. These palaeosols differ from those seen in Quatemary fans. Which are characterized by climatically induced periods of stability and instability.
eng
Atribución-NoComercial-SinDerivadas 3.0 España
Soil-landscape and climatic relationships in the middle Miocene of the Madrid Basin
journal article
URL
https://docta.ucm.es/bitstreams/91d29fe4-a917-4182-b601-b3166f686cae/download
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8e1345acdb532831cee2d8be31127de0
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application/pdf
124-11.pdf
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https://docta.ucm.es/bitstreams/20f45520-f6c3-40e5-b18b-93adf51ec8ed/download
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289ecf9498a7438d6fa01c98fbd12a63
65546
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124-11.pdf.txt