Stream mouth deposits in the palaeontological site of Somosaguas, Middle Miocene, Madrid Basin
- Díez-Canseco, Davinia 1
- López-Martínez, Nieves 2
- Díaz-Molina, Margarita 2
- Benito, Mª Isabel 2
- 1 Departamento de Estratigrafía, Universidad Complutense de Madrid (IGEO)
- 2 Departamento de Paleontología, Universidad Complutense de Madrid
ISSN: 2255-0550
Year of publication: 2012
Issue Title: SPANISH JOURNAL OF PALAEONTOLOGY
Volume: 27
Issue: 2
Pages: 93-104
Type: Article
More publications in: Spanish journal of palaeontology
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Abstract
The Middle Miocene sediments exposed in Somosaguas contain an excellent record of mammal fossil remains preserved in debris and mudflow 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 flow deposits. The whole of the lacustrine deposits are interbedded between debris and mud flow 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
Funding information
This research was supported by the Ministerio de Ciencia e Innovación of Spain (Proyect CGL2009-09000 and a FPI predoctoral contract). We wish to thank Rudnik Ciencias de la Tierra, S.L. by the wells made in the fossil site and Somosaguas Paleontology Project team (http:// www.ucm.es/info/somosagu/) for their help, particularly M.Funders
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- CGL2009-09000
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- 910429
- Universidad de Alicante Spain