Middle Pleistocene to Holocene geochronology of the River Aguas terrace sequence (Iberian Peninsula): Fluvial response to Mediterranean environmental change

Schulte, Lothar; Julià, Ramón; Burjachs, Francesc; Hilgers, Alexandra

doi:10.1016/j.geomorph.2007.03.018

Cited by 73 publications

(63 citation statements)

References 51 publications

(65 reference statements)

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“…Similar issues can be identified with a range of other dating techniques, including radiocarbon and optically stimulated luminescence, and the future study of Mediterranean glaciations should strive to apply multiple techniques simultaneously. This has now been achieved in many studies of the Pleistocene fluvial record in the Mediterranean (Lewin et al 1991;Hamlin et al 2000;Rowan et al 2000;Schulte et al 2008;Woodward et al 2008;Macklin & Woodward 2009). This is the ideal approach, but resource constraints and the availability of suitable samples often provide obstacles to achieving this ambition.…”

Section: Mediterranean Glaciation: Progress Problems and Prospectsmentioning

confidence: 90%

Quaternary glaciation in the Mediterranean mountains: a new synthesis

Hughes

Woodward

2016

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The Mediterranean mountains were repeatedly glaciated during the Pleistocene. Glaciers were present in most of the major mountains areas from Morocco in the west to the Black Sea coast of Turkey in the east. Some mountains supported extensive ice caps and ice fields with valley glaciers tens of kilometres long. Other massifs sustained only small-scale ice masses, although this was the exception rather than the norm. Glaciers still exist today and there is evidence that small glaciers were a common sight in many regions during the Little Ice Age. The Mediterranean mountains are important for palaeoclimate research because of their position in the midlatitudes and sensitivity to changes in the climate regimes of adjacent areas including the North Atlantic. These mountains are also important areas of biodiversity and long-term biological change through the Quaternary ice age. All of this provided challenges and opportunities for Palaeolithic societies. This paper reviews the history of the study of glaciation in the Mediterranean mountains from pioneer nineteenth century observations through to the detailed geomorphological mapping and advanced geochronological datasets of recent times. We also review the current state of knowledge to frame the contributions presented in this volume. Lastly, this new synthesis then identifies outstanding research problems and assesses the prospects for new studies of glaciation in the Mediterranean mountains.

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Section: Mediterranean Glaciation: Progress Problems and Prospectsmentioning

confidence: 90%

Quaternary glaciation in the Mediterranean mountains: a new synthesis

Hughes

Woodward

2016

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“…A few terrestrial sequences covering the entire last glacial and previous glacial periods are available on the Iberian Peninsula (e.g. Pons and Reille, 1988;Montserrat, 1992;Burjachs and Juliá, 1994;Carrió n et al, 1998;Gó mez-Orellana et al, 2007;Schulte et al, 2009), but most continental climate and vegetation changes in Iberia have been inferred from marine cores. In these studies, the pollen content of marine sediments is frequently used to reconstruct the continental climates in the westernmost Mediterranean (Combourieu-Nebout et al, 2002;Sánchez-Goñ i et al, 2002;Baudin et al, 2007) and the Iberian margin (Sánchez-Goñ i et al, 1999Boessenkool et al, 2001;Roucoux et al, 2005) and reveal that arid and cold conditions occurred during Heinrich events (HE) and some cold stadials.…”

Section: Introductionmentioning

confidence: 99%

Identification of arid phases during the last 50 cal. ka BP from the Fuentillejo maar‐lacustrine record (Campo de Calatrava Volcanic Field, Spain)

Vegas

Ruíz-Zapata

Ortíz

et al. 2009

J Quaternary Science

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J. L. 2010. Identification of arid phases during the last 50 cal. ka BP from the Fuentillejo maar-lacustrine record (Campo de Calatrava Volcanic Field, Spain).ABSTRACT: Geochemical (element analysis, molecular analysis of organic compounds), physical, palynological, mineralogical and sedimentary facies analysis were performed to characterise the sedimentary record in Fuentillejo maar-lake in the Central Spanish Volcanic Field of Campo de Calatrava, in order to reconstruct the palaeoenvironmental and palaeoclimatic processes which controlled vegetation patterns and deposition of different sedimentary facies. The upper 20 m of core FUENT-1 show variations in clastic input, water chemistry, vegetation and organic fraction sources in the lake throughout the Late Pleistocene and Holocene. The temporal framework provided by 14 C accelerator mass spectrometry dating allows assigning the sequence to the last 50 cal. ka BP. Arid phases identified in the FUENT-1 sequence are correlated to Heinrich events (HE) and to stadials of the Dansgaard/Oeschger (D/O) cycles. Siliciclastic facies with high magnetic susceptibility values, high Juniperus pollen content, a low Paq index (aquatic macrophysics proxy index), a decrease in the relative percentage of the n-C 27 and an increase in the n-C 31 alkanes are indicative of arid and colder climatic events related to HE 2, HE 1 and the Younger Dryas (YD). Similar short cold and arid phases during the Holocene were identified at 9.2-8.6, 7.5-7 and 5.5-5 cal. ka BP. In dolomite-mud facies, the pollen data show an increase in the herbs component, mainly -Chenopodiaceae, Artemisia and Ephedra -steppe taxa; a low Paq index, a decrease in the relative percentage of the n-C 27 alkane and an increase in the n-C 31 alkane are also observed. This facies was probably the result of lower lake levels and more saline-alkaline conditions, which can be interpreted as linked to arid-warm periods. These warm and arid phases were more frequent during Marine Isotope Stage (MIS) 3 and the interstadials of MIS 2. HE 4, HE 2, HE 1 and the YD in core FUENT-1 were immediately followed by increases of warm steppe pollen assemblages that document rapid warming similar to the D/O cycles but do not imply increasing humidity in the area. Fuentillejo hydrology is controlled by changes in the atmospheric and oceanic systems that operated on the North Atlantic region at millennial scale during the last 50 cal. ka BP.

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“…By analogy with other Pleistocene valley infillings (e.g. ), it is likely that the whole PA valley fill consists of outer, relatively older PA facies while toward the valley interior successively younger, inset bodies of PA facies occur (e.g., Fuller et al, 1998;Macklin et al, 2002;Schulte, 2002;Bridgland et al, 2006;Santisteban and Schulte, 2007;Schulte et al 2008;Lewis et al, 2009). While this often coincides with morphostratigraphically explicit terrace staircases, this is -however -not the case in the Palancia River watershed.…”

Section: Pleistocene Aggradation and Degradationmentioning

confidence: 85%

“…Consequently, a long-standing record of research is available on the controls of geomorphic responsiveness of Mediterranean river systems at various temporal and spatial scales. For example, to indicate the geomorphic efficacy of Quaternary climate change in circum-Mediterranean settings, authors have investigated staircases of alluvial terrace landforms (e.g., Macklin et al, 2002;Klinger et al, 2003;Zarki et al, 2004;Schulte et al, 2008;Lewis et al, 2009). Moreover, drapes of fine-grained floodplain fills and slackwater flood deposits are analyzed to unravel environmental controls of Pleistocene to Holocene river activity (e.g., Fuchs and Lang, 2001;Thorndycraft and Benito, 2006;Benito et al, 2008;Zielhofer and Faust, 2008).…”

Section: Introductionmentioning

confidence: 99%