Spatial distribution of morphometric parameters of glacial cirques in the Central Pyrenees (Aran and Boí valleys)

Lopes, Luís Filipe; Oliva, Marc; Fernandes, Marcelo; Pereira, Paulo; Palma, Pedro; Fernández, Jesús Ruíz

doi:10.1007/s11629-018-4873-x

Cited by 10 publications

(6 citation statements)

References 41 publications

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“…Figure 1 The relief is structured by the U-shaped Garonne valley that drains towards the N-NW, receiving inflow from tributary rivers that drain adjacent glacial valleys with headwaters in peaks ranging from 2800 to 3000 m. Glacial cirques in the Upper Garonne valley are predominantly NE-exposed and the altitude of their floors ranges between 2200 and 2400 m (Lopes et al, 2018). The floor of the Bacivèr Cirque, where this study focuses, is located at similar altitudes but faces W; it extends J o u r n a l P r e -p r o o f over 10 km 2 with the highest altitudes exceeding 2600 m at the Marimanya (2675 m; 42°42'33"N 1°00'44"E), La Llança (2658 m) and Bacivèr (2642 m) peaks and the lowest at 1850-1900 m at the Beret Plateau (Fig.…”

Section: -Study Areamentioning

confidence: 99%

Rapid deglaciation during the Bølling-Allerød Interstadial in the Central Pyrenees and associated glacial and periglacial landforms

et al. 2021

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Section: -Study Areamentioning

confidence: 99%

Rapid deglaciation during the Bølling-Allerød Interstadial in the Central Pyrenees and associated glacial and periglacial landforms

et al. 2021

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“…Conspicuously absent, however, is a periglacial “position paper” of a nature similar to that provided by King (1982) 86 for glacial geomorphometry, which has since developed into a mature subject making extensive use of contemporary technology and tectonic theory (e.g., 66,67,87–91 ). Together, this paper and a related study, 9 constitute a contribution to what has potential to become a coherent field of study, tentatively called periglacial geomorphometry .…”

Section: Methodsmentioning

confidence: 99%

“…In periglacial work the focus has often been to analyze and predict the distribution of periglacial features, including patterned ground, 80,81 rock glaciers, 82 solifluction lobes, 79,83 and blockfields. 84,85 Conspicuously absent, however, is a periglacial "position paper" of a nature similar to that provided by King (1982) 86 for glacial geomorphometry, which has since developed into a mature subject making extensive use of contemporary technology and tectonic theory (e.g., 66,67,[87][88][89][90][91] ). Together, this paper and a related study, 9 Intuitively, the hypsometric integral of terrain dominated by cryoplanation landforms should retain relatively high values as erosion of the landscape proceeds.…”

Section: Hypsometry and Periglacial Geomorphometrymentioning

confidence: 99%

Characteristic periglacial topography: Multi‐scale hypsometric analysis of cryoplanated uplands in eastern Beringia

Queen

Nelson

2022

Permafrost & Periglacial

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General geomorphometry is concerned with the geometric form of the continuous land surface and can be useful for identifying topographic "signatures." Hypsometry has found numerous applications in several subfields of geomorphology, but has not been used extensively in published periglacial work. Hypsometric analysis was applied in this study to several unglaciated and glaciated locales in Alaska's Yukon-Tanana Upland and Indian River Upland physiographic sections, extensive areas of eastern Beringia in which cryoplanation landforms are ubiquitous. Never-glaciated terrain in this region has a hypsometric signature distinctly different from that of glaciated areas within sample areas ranging in size from 0.25 to 100 km 2 . Cryoplanated terrain exhibits a distinctive convex-upward hypsometric signature, a reflection of a greater proportion of the reference solid (land mass) remaining intact than in typical mature fluvial or glaciated terrain. Because the elevational position of cryoplanation terraces is slightly below and parallel with snowline position it is, in effect, climatically determined from above, and localized planar surfaces develop near that level. Comparison with terrain in the southwestern USA demonstrates that substantial differences also exist between the hypsometry of upland periglacial terrain in eastern Beringia and that of inselbergs and pediments in warm-desert geomorphic landscapes, casting doubt on a suggestion that cryoplanation terraces and cryopediments in high-latitude mountains could be inherited from past intervals of subtropical desert conditions We conclude that characteristic periglacial erosional topography exists in unglaciated areas of Beringia and can be detected and described quantitatively through objective methods.

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“…The Upper Garonne Valley shows the typical U-shaped cross-section of glacial valleys, and the Garonne River flows to the north-northwest through the central axis of the Pyrenees. Several tributary rivers drain the glacial valleys descending from glacial cirques carved below peaks from 2800 to 3000 m. Glacial cirques are prevailingly northeastoriented, with floors generally between 2200 and 2400 m (Lopes et al, 2018).…”

Section: Study Areamentioning

confidence: 99%

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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Spatial distribution of morphometric parameters of glacial cirques in the Central Pyrenees (Aran and Boí valleys)

Cited by 10 publications

References 41 publications

Rapid deglaciation during the Bølling-Allerød Interstadial in the Central Pyrenees and associated glacial and periglacial landforms

Rapid deglaciation during the Bølling-Allerød Interstadial in the Central Pyrenees and associated glacial and periglacial landforms

Characteristic periglacial topography: Multi‐scale hypsometric analysis of cryoplanated uplands in eastern Beringia

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

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