South-western Duero and Ciudad Rodrigo basins: infill and dissection of a Tertiary basin



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Santisteban Navarro, Juan Ignacio and Martín Serrano, Ángel and Mediavilla López, Rosa María and Dabrio, Cristino J. (1996) South-western Duero and Ciudad Rodrigo basins: infill and dissection of a Tertiary basin. In Tertiary basins of Spain : the stratigraphic record of crustal kinematics. World and regional geology series (6). Cambridge University Press, Cambridge, New York, pp. 196-202. ISBN 0521461715

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In the soult western sector of the intracontinetal Duero basin, the post-Hercynian sedimentary record consist of Upper Cretaceous to Quaternary terrestrial sediments. Climates shifted from tropical, with poorly defined seansos (end of Cretaceous), to Mediterranean (Neogene). Tertiary deposits are divided into three tectonographic completes. The Late Cretaceous-Paleocene, related to the end of the Mesozoic cycle, is caractericed by a well developed weathering profile that eroded later. The Eocene Oligocene, formed during the morpho-structural definition of the actual basin boundaries, consists of three unconformity-bounded units related to successive tectonic events of the Alpine Orogeny by the cnd of this cycle, progressive incision of the Atlantic nuvial network led to capture of the fluvial systems of the southern Duero basin and degradation (emptying) began. The Miocene-Phocene, related to and extensional tectonic regime represents the spreading of exorheik conditions to the whole basin that marked a complete hydrugraphic reorganisation. Deposition and aggradation continued in more central areas of the basin until the end of the Neogene, coeval with degradation of the south-western corner of the Duero Basin. The coexistence resulted from differential subsidence, hinge lines (uplift zones) separated sub-basins, and the dynamics of capture processes.

Item Type:Book Section
Uncontrolled Keywords:Sedimentary; Stratigraphy; Duero basin; Spain
Subjects:Sciences > Geology > Stratigraphic geology
ID Code:12542
Deposited On:07 Apr 2011 09:33
Last Modified:11 Dec 2018 08:42

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