Chronology of fluvial terrace sequences for large Atlantic rivers in the Iberian Peninsula (Upper Tagus and Duero drainage basins, Central Spain)

Silva, Pablo G.; Roquero, Elvira; López-Recio, Mario; Huerta, Pedro; Martínez-Graña, Antonio Miguel

doi:10.1016/j.quascirev.2016.05.027

Cited by 55 publications

(109 citation statements)

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“…However, there are not enough reliable and precise absolute ages to support a detailed correlation between the staircases of the Middle and Upper Tejo/Tajo (in Spain, up to 16 fluvial terrace levels) and the Lower Tejo (in Portugal, only 6 terrace levels). We should also note that the sedimentary controls for the formation of the Lower Tejo staircases are different (mainly glacio-eustasy and differential uplift) and that the Lower Tejo is separated from the Middle and Upper Tejo by a large permanent knick zone of hard basement Silva et al, 2016). The ages already obtained from the terraces of the lower reach of the Portuguese Mondego River (Ramos et al, 2012) seem to correlate well with the Lower Tejo River terraces; both of the river reaches seem to have glacio-eustatic control on their development.…”

Section: Pp Cunha Et Al / Quaternary Science Reviews XXX (2016) 1ementioning

confidence: 98%

New data on the chronology of the Vale do Forno sedimentary sequence (Lower Tejo River terrace staircase) and its relevance as a fluvial archive of the Middle Pleistocene in western Iberia

Cunha

Martins

Buylaert

et al. 2017

Quaternary Science Reviews

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a b s t r a c tThe Vale do Forno archaeological sites (Alpiarça, central Portugal) document the earliest human occupation in the Lower Tejo River, well established in geomorphological and environmental terms, within the Middle Pleistocene. In a staircase of six fluvial terraces, the Palaeolithic sites were found on the T4 terrace (þ24 m, above river bed) which is made of a basal Lower Gravels unit (LG) and an overlying Upper Sands unit (US). Geomorphological mapping, coupled with lithostratigraphy, sedimentology and luminescence dating (quartz-OSL and K-feldspar post-IRIR 290 ) were used in this study. The oldest artefacts found in the LG unit show crude bifacial forms that can be attributed to the Acheulian. In contrast, the US unit has archaeological sites stratigraphically documenting successive phases of an evolved Acheulian. Luminescence dating and correlation with the Marine Isotopic Stages suggest that the LG unit has a probable age of ca. 335 to 325 ka and the US unit an age of ca. 325 to 155 ka. This is in contrast to previous interpretations ascribing this terrace (and lithic industries) to the Last Interglacial and early phases of the Last Glacial. The VF3 site (Milhar os), containing Micoquian (Final Acheulian) industries (with fine and elaborated bifaces), found in a stratigraphic level located between the T4 terrace deposits and a colluvium associated with Late Pleistocene aeolian sands, is younger than 155 ka but much older than 32 ka.© 2016 Elsevier Ltd. All rights reserved. IntroductionUnderstanding of the Palaeolithic occupation of Northern Europe has been substantially based on evidence from rivers (e.g. Bridgland et al., 2006). For Western Europe and specifically in Iberia, insights into the Palaeolithic occupation is similarly derived from its major rivers (from north to south: Douro, Tejo/Tagus, Guadiana, Guadalquivir) (e.g. Santonja and Villa, 2006). Within this context, the Vale do Forno archaeological sites (Alpiarça, in central Portugal; Fig. 1) provide the earliest and most well documented human occupation in the Lower Tejo (the Portuguese part of the Tejo basin). Lower Palaeolithic bifacial sites are common, often well represented by lithic industries. Their local stratigraphy and technological characteristics indicate successive phases of what is commonly named as the Acheulian. However, they were chronologically poorly constrained.From the Spanish border to the Atlantic coast, the Tejo crosses major faults which provide a natural geomorphological subdivision of the river into a series of valley reaches (I to V;Cunha et al., 2005). * Corresponding author.E-mail addresses: pcunha@dct.uc.pt (P.P. Cunha), aam@uevora.pt (A.A. Martins), jabu@dtu.dk (J.-P. Buylaert), anmu@dtu.dk (A.S. Murray), 3raposos@sapo.pt (L. Raposo), paolo.mozzi@unipd.it (P. Mozzi), m.stokes@plymouth.ac.uk (M. Stokes).

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Section: Pp Cunha Et Al / Quaternary Science Reviews XXX (2016) 1ementioning

confidence: 98%

New data on the chronology of the Vale do Forno sedimentary sequence (Lower Tejo River terrace staircase) and its relevance as a fluvial archive of the Middle Pleistocene in western Iberia

Cunha

Martins

Buylaert

et al. 2017

Quaternary Science Reviews

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“…There are also rotational and translational landslides, and cracks that can initiate further landslides [12][13][14].…”

Section: Integrated Analysis Of the Physical Environmentmentioning

confidence: 99%

Analysis of the Hazard, Vulnerability, and Exposure to the Risk of Flooding (Alba de Yeltes, Salamanca, Spain)

et al. 2017

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Abstract:The present work has developed a method using GIS technology to evaluate the danger, vulnerability, and exposure to the risk of flooding in the Alba de Yeltes area (Salamanca, Spain). It is a non-structural measure for the prevention and mitigation of the risk of extraordinary flooding. After completing a full analysis of the physical environment (climate, geology, geomorphology, hydrology, hydrogeology, and land use), hydrological-hydraulic modeling was carried out using the GeoHecRas river analysis software. The results obtained from the analysis and the models have generated a danger map that facilitates the efficient evaluation of the spatial distribution of the different severity parameters (depth of the watersheet, current flow rate, and flood-prone areas). Also, map algebra and the databases associated with GIS tools, together with the vulnerability and exposure cartography, have allowed the risk to be analyzed in an integrate manner and the production of an environmental diagnostic map. The results of this study propose that there are inhabited areas close to the Yeltes-Morasverdes riverbed that have a high risk of flooding, indicating the need for proper land planning and the implementation of a series of measures that will help to reduce the risk of flooding and its impact.

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“…Estos yacimientos se caracterizan en su conjunto por la presencia de bifaces de mediano y gran formato, con mucha frecuencia elaborados sobre grandes lascas, de factura achelense (Modo Técnico 2). En muchos casos estos conjuntos líticos se encuentran asociados a yacimientos paleontológicos con fauna de características cálidas como son el elefante de defensas rectas (Palaeoloxodon antiquus), rinocerontes (stephanorhinus hemiothecus), hipopótamos (hippopotamus amphibious) y grandes cérvi-dos (Cervus elaphus) en niveles de terrazas fluviales situados entre +45 y +18-20 m sobre los cauces actuales de los ríos (Silva et al, 2017).…”

Section: Sea-level Curve and Marine Isotopic Stages (Mis) Defined By unclassified

“…En las terrazas de los grandes ríos atlánticos de la Península este tránsito se registra en las terrazas a +18-20m, situándose crono-estratigráficamente en torno a los 100 -80 ka (Silva et al, 2017;Rubio-Jara et al, 2016). Por estas mismas fechas (finales del MIS 5) homo sapiens ya ha poblado la totalidad del continente africano.…”

Section: El úLtimo Interglaciar: Misunclassified

“…Estas fechas pueden tener un error de hasta ± 2 ka, pero todos ellos fueron eventos muy rápidos, con una duración media de unos 750 años, y de aparición súbita reducida a unos pocos años (Maslin et al, 2001). En el sector central de la Península Ibérica los eventos Heinrich más recientes (H4 -H1) parecen controlar la sedimentación fluvial asociada al desarrollo de los niveles de terraza más bajos (< +15 m), asociados en su mayor parte a industria del Paleolítico medio (Musteriense) y fauna fría (Silva et al, 2017). El evento H4 (24 ± 2 ka) podría estar relacionado con el inicio de la deglaciación al menos en la zona centro de la Península (Sistema Central).…”

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El Periodo Cuaternario: La Historia Geológica de la Prehistoria

Barroso

Bardajı́

Roquero

et al. 2017

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ResumenEste trabajo presenta una síntesis de la estratigrafía y geocronología del Periodo Cuaternario tras la actualización cronoestratigráfica aprobada por la Comisión Internacional de Estratigrafía (ICS-IUGS) y la Unión Internacional para el Estudio del Cuaternario (INQUA). Se aportan los datos más recientes sobre estratigrafía, cronología y paleoclimatología de este periodo en la Península Ibérica, así como los esquemas o fuentes bibliográficas más clásicas. Se da una visión general de la Prehistoria enmarcándola dentro de los episodios o eventos climáticos más característicos del Pleistoceno final, Holoceno y Antropoceno. Esta síntesis pretende ser una guía resumida de la cronología cuaternaria para todos aquellos investigadores que, trabajando en el Periodo Cuaternario, no poseen una formación científica adecuada al respecto.

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Chronology of fluvial terrace sequences for large Atlantic rivers in the Iberian Peninsula (Upper Tagus and Duero drainage basins, Central Spain)

Cited by 55 publications

References 40 publications

New data on the chronology of the Vale do Forno sedimentary sequence (Lower Tejo River terrace staircase) and its relevance as a fluvial archive of the Middle Pleistocene in western Iberia

New data on the chronology of the Vale do Forno sedimentary sequence (Lower Tejo River terrace staircase) and its relevance as a fluvial archive of the Middle Pleistocene in western Iberia

Analysis of the Hazard, Vulnerability, and Exposure to the Risk of Flooding (Alba de Yeltes, Salamanca, Spain)

El Periodo Cuaternario: La Historia Geológica de la Prehistoria

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