Deglaciación en la Cordillera Cantábrica: modelo y evolución

Cañadas, Enrique Serrano; Gómez‐Lende, Manuel; Pellitero, Ramón; Trueba, Juan José González

doi:10.18172/cig.2716

Cited by 32 publications

(14 citation statements)

References 51 publications

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“…The maximum advance was prior to the Last Glacial Maximum (LGM) according to chronological data . The range has been ice free during the Holocene, except some very small glaciers in the Picos de Europa during the Little Ice Age (LIA) that progressively melted or receded to small ice‐patches that persist today …”

Section: Study Areamentioning

confidence: 99%

“…34,76,78,79 The range has been ice free during the Holocene, except some very small glaciers in the Picos de Europa during the Little Ice Age (LIA) that progressively melted or receded to small ice-patches that persist today. 80 During receding phases, up to 173 rock glaciers developed in the range. [27][28][29] They are all considered to be relict features ( Figure 2).…”

Section: Introductionmentioning

confidence: 99%

“…[27][28][29] They are all considered to be relict features ( Figure 2). Most appear to have formed during a cold and dry phase of the Younger Dryas event, 80 but chronological data are restricted to one rock glacier in the northern slope, showing movement cessation at 15.7 ± 0.8 ka, 34 and another one in the southern slope, showing movement cessation at 13.0 ± 0.2 ka. 35 Both of these ages pre-date the Younger Dryas event, so rock glaciers could be related to different glacial recessional phases, with strong paraglacial influence and not related to any specific climatic period.…”

Section: Introductionmentioning

confidence: 99%

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Surface macro‐fabric analysis of relict rock glaciers in the Cantabrian Mountains (NW Spain)

Gutiérrez

González

Gómez-Villar

et al. 2019

Permafrost & Periglacial

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Relict rock glaciers are widespread in the Cantabrian Mountains, with more than 250 lobate, tongued‐shaped and complex landforms identified. Located mostly within glacial cirques, facing north and northeast, these landforms are indicative of the distribution of ancient permafrost. Macro‐fabric analysis allows us to reconstruct the past dynamics of these landforms. Surface macro‐fabric analysis of 34 rock glaciers including both ridge and furrows was performed. The orientation and dip of 50 clasts was determined in each case. All data were plotted in equal‐area stereograms and the eigenvalue method was used for statistical analysis of the data. The data show weak fabric shapes, with the transitional and the girdle shapes being the most representative, with 67.6% of the samples studied. The main fabric direction (eigenvalue S1) is found in 40–60% of the clasts, and only 11.7% present values ≥0.60. Clast concentration density in the stereograms gives concentrations <10% in more than 73.5% of the samples. Ridge samples have a more intense fabric than those of the furrows. The tongue‐shaped rock glaciers show more diverse values than those with lobate and complex forms.

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Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface macro‐fabric analysis of relict rock glaciers in the Cantabrian Mountains (NW Spain)

Gutiérrez

González

Gómez-Villar

et al. 2019

Permafrost & Periglacial

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“…), demostrándose que durante el Bølling-Allerød el glaciar llegó a desaparecer completamente, sin que existan evidencias de reavance durante el Dryas Reciente (Delmas, 2015). Serrano et al (2013Serrano et al ( , 2015a localizan en la Cordillera Cantábrica varias morrenas correspondientes a pequeños avances y glaciares rocosos atribuibles al Younger Dryas, que habitualmente se han incluido en la llamada Fase de «Glaciares de Altitud» en los macizos más elevados y en circos con exposición norte. La formación de glaciares rocosos fue habitual durante este periodo, contabilizándose hasta 160 ya relictos (Redondo et al, 2010;Gómez-Villar et al, 2011;Pellitero et al, 2011).…”

Section: Pirineosunclassified

“…La formación de glaciares rocosos fue habitual durante este periodo, contabilizándose hasta 160 ya relictos (Redondo et al, 2010;Gómez-Villar et al, 2011;Pellitero et al, 2011). Serrano et al (2012Serrano et al ( , 2013Serrano et al ( , 2015a encontraron numerosas morrenas correspondientes a pequeños glaciares de circo, y glaciares rocosos que se atribuirían también al Dryas Reciente, siempre en circos orientados al norte, situados en macizos de más de 2000 m de altitud en el sector central de la Cordillera. Serrano et al (2015b) señalan que los macizos más orientales de la Cordillera Cantábrica, con altitudes más limitadas, estarían libres de hielo durante el Dryas Reciente.…”

Section: Pirineosunclassified

Evidencias de actividad glaciar durante el Dryas reciente (12,9-11,7 ka BP) en la Península Ibérica

García‐Ruiz¹,

Palacios²,

González-Sampériz³

et al. 2016

CyG

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The Younger Dryas (GS-1, entre 12,9 y 11,7 ka BP) was characterized by a remarkable declining in temperature at a global scale. The consequence was a moderate re-advance of glaciers that also affected the main ranges of the Iberian Peninsula. This paper reviews the available information on the location, evolution and extent of such glaciers. The geomorphological activity during the Younger Dryas in the Iberian Peninsula has been identified throughout the presence of morainic deposits (dated in most cases with cosmogenic exposure ages), rocky thresholds polished by the ice, and rock glaciers. The best examples of Younger Dryas moraines were found in the Central Pyrenees, with short ice tongues of up to 4 km in length in the highest massifs and a number of glacial cirques. There is also evidence of small cirque glaciers in the Cantabrian Range and the Central System Range (Gredos and Guadarrama sierras), as deduced by rocky thresholds and morainic deposits close to cirque headwalls. Conversely, in Sierra Nevada (southernmost sector of the Iberian Peninsula) the only evidence of the Younger Dryas is the presence of rock glaciers that were developed during the Oldest Dryas and survived during the Younger Dryas.

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Glacial oscillations during the Bølling–Allerød Interstadial–Younger Dryas transition in the Ruda Valley, Central Pyrenees

Fernandes

Oliva

Vieira

et al. 2021

J Quaternary Science

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The Upper Garonne Basin included the largest glacial system in the Pyrenees during the last glacial cycle. Within the long-term glacial retreat during Termination-1 (T-1), glacier fluctuations left geomorphic evidence in the area. However, the chronology of T-1 glacial oscillations on the northern slopes of the Central Pyrenees is still poorly constrained. Here, we introduce new geomorphological observations and a 12-sample dataset of 10 Be cosmic-ray exposure ages from the Ruda Valley. This U-shaped valley, surrounded by peaks exceeding 2800 m a.s.l., includes a sequence of moraines and polished surfaces that enabled a reconstruction of the chronology of the last deglaciation. Following the maximum ice extent, warmer conditions prevailing at ~15-14 ka, during the Bølling-Allerød (B-A) Interstadial, favoured glacial retreat in the Ruda Valley. Within the B-A, glaciers experienced two phases of advance/stillstand with moraine formation at 13.5 and 13.0 ka. During the early Younger Dryas (YD), glacial retreat exposed the highest surfaces of the Saboredo Cirque (~2300-2350 m) at 12.7 ka. Small glaciers persisted only inside the highest cirques (~2470 m), such as in Sendrosa Cirque, with moraines stabilising at 12.6 ka. The results of this work present the most complete chronology for Pyrenean glacial oscillations from the B-A to the YD.

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Deglaciación en la Cordillera Cantábrica: modelo y evolución

Abstract: ABSTRACT. The last deglaciation of the Cantabrian

Cited by 32 publications

References 51 publications

Surface macro‐fabric analysis of relict rock glaciers in the Cantabrian Mountains (NW Spain)

Surface macro‐fabric analysis of relict rock glaciers in the Cantabrian Mountains (NW Spain)

Evidencias de actividad glaciar durante el Dryas reciente (12,9-11,7 ka BP) en la Península Ibérica

Glacial oscillations during the Bølling–Allerød Interstadial–Younger Dryas transition in the Ruda Valley, Central Pyrenees

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