Una cubeta endorreica residual plio-pleistocena en la zona de relevo entre las fallas de Concud y Teruel: implicaciones paleogeográficas.
- Lope Ezquerro 1
- Paloma Lafuente 1
- Mª Dolores Pesquero 2
- Luis Alcalá 2
- Luis E. Arlegui 1
- Carlos L. Liesa 1
- Luis Luque 2
- Miguel A. Rodríguez Pascua 3
- José L. Simón 1
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1
Universidad de Zaragoza
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- 2 Fundación Conjunto Paleontológico de Teruel-Dinópolis, Av/ Sagunto, s/n 44002 Teruel, España.
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3
Instituto Geológico y Minero de España
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ISSN: 0214-2708
Année de publication: 2012
Volumen: 25
Número: 3-4
Pages: 157-176
Type: Article
D'autres publications dans: Revista de la Sociedad Geológica de España
Résumé
The Concud fault is a normal fault whose dominant NW-SE strike veers to NNW-SSE at its southern segment. Here, it approaches the N-S striking Teruel fault showing a right relay arrangement, the displacement between them being transferred by means of a relay ramp dipping towards NNW. The hanging wall area framed by the angle of the Concud fault and the relay ramp shows the highest total accumulated tectonic subsidence (290-300 m). A residual endorheic small basin, filled with alluvial and lacustrine-palustrine deposits, occupies this area since the beginning of the extensional activity of the Concud fault (latest Ruscinian, 3.6 Ma), while sedimentation was interrupted on the footwall. This endorheic basin persists up to the earliest Pleistocene, as demonstrated by the age supplied by a new mammal site (Rotonda Teruel-Centro; MN 17 zone, Middle Villafranchian). The lacustrine system probably constituted by that time the local base level of the Gea alluvial system (Villafranchian pediment), which would not be still connected to the external drainage. The change from internal to external drainage setting at the central and northern Teruel basin would have therefore occurred later during Early Pleistocene times.