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Title: Dating the Earliest Pleistocene alluvial terrace of the Alcanadre River (Ebro Basin, NE Spain): insights into the landscape evolution and involved processes
Authors: Sancho Marcén, Carlos
Calle, Mikel
Peña Monné, José Luis
Duval, Mathieu
Oliva-Urcia, Belén
Pueyo, Emilio L.
Benito, Gerardo
Moreno Caballud, Ana
Keywords: Alluvial terrace piedmont;ESR and palaeomagnetism dating;Early Pleistocene;Landscape evolution;NE Spain
Issue Date: Jul-2016
Publisher: Elsevier
Citation: Quaternary International, 2016, 407, Part A, 86-95
Abstract: This work presents the results of a multi-approach study of the extensive highest terrace (Qt1) of the Alcanadre River system (Ebro Basin, Spain). The timing of the earliest morphosedimentary fluvial archives in the Ebro Basin (NE Spain) under exorheic conditions is provided from ESR dating techniques applied to optically bleached quartz grains and complemented by palaeomagnetic data and morphopedosedimentary features. A mean ESR age estimate of 1276 ± 104 ka based on the Ti-centre provides the oldest numerical age obtained for a Quaternary terrace in the Iberian Peninsula. The polarity determined by palaeomagnetic analysis is normal, although it must be contained within the Matuyama reversed period. Therefore, Cobb Mt is the more suitable chron, although Jaramillo cannot be fully ruled out. This age is consistent with the last stretch of the Matuyama reversed Chron deduced from palaeomagnetism. Relevant consequences concerning the palaeogeographical setting, palaeoclimatic context and fluvial incision rates are discussed to elucidate the landscape evolution of NE Iberia.
ISSN: 1932-6203
DOI: 10.1016/j.quaint.2015.10.050
Type: Article
Appears in Collections:Datación por Resonancia Paramagnética Electrónica
Geocronología y Geología

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