Stream mouth deposits in the palaeontological site of Somosaguas, Middle Miocene, Madrid Basin
The Middle Miocene sediments exposed in Somosaguas contain an excellent record of mammal fossil remains preserved in debris and mudfl ow deposits. In the sedimentary sequence of Somosaguas three facies associations are distinguished, representing alluvial fan and shallow lake margin environments. Al...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/44536 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/44536 |
| Access Level: | acceso abierto |
| Palabra clave: | 56(460.27Pozuelo de Alarcón, Somosaguas) (460.27Pozuelo de Alarcón, Somosaguas)56 551.3.051(460.27Pozuelo de Alarcón, Somosaguas) (460.27Pozuelo de Alarcón, Somosaguas)551.3.051 551.782.1(460.27) (460.27)551.782 Alluvial fan Shallow lake margin Stream mouth deposits Abanico aluvial Margen de lago somero Lóbulos de desembocadura Geología estratigráfica Paleontología 2506.19 Estratigrafía 2416 Paleontología |
| Sumario: | The Middle Miocene sediments exposed in Somosaguas contain an excellent record of mammal fossil remains preserved in debris and mudfl ow deposits. In the sedimentary sequence of Somosaguas three facies associations are distinguished, representing alluvial fan and shallow lake margin environments. Alluvial fans are composed of mud and debris fl ow deposits. The whole of the lacustrine deposits are interbedded between debris and mud fl ow deposits. The shallow lake deposits are devoid of fossil remains, and they consist of well-sorted micaceous sandstone bodies with water flow structures, interbedded with thin mudstone beds. These sandstone bodies are interpreted as stream mouth lobes. Three integrated stratigraphic sections show that the lacustrine bedset overlain an erosion surface, probably scoured by flood waters. Palaeocurrent measurements indicate that the sediment filling the shallow lake came from the west and the north. |
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