Glacial evolution and periglacial morphodynamics in the Asturian area of Puerto de Ventana (Cantabrian Mountains)
Despite the recent advances in glacial and periglacial studies in the Cantabrian Mountains, the focus of research has been on the highest altitude areas, while areas such as the central-western sector of the Asturian mountain have received less attention. In this sector, Puerto de Ventana constitute...
| Main Authors: | , , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | Spanish |
| Published: |
Universidade da Coruña, Servizo de Publicacións
2021
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| Subjects: | |
| Online Access: | https://revistas.udc.es/index.php/CADLAXE/article/view/cadlaxe.2021.43.0.8841 https://doi.org/10.17979/cadlaxe.2021.43.0.8841 |
| Summary: | Despite the recent advances in glacial and periglacial studies in the Cantabrian Mountains, the focus of research has been on the highest altitude areas, while areas such as the central-western sector of the Asturian mountain have received less attention. In this sector, Puerto de Ventana constitutes a paradigmatic area due to its altimetric and lithostratigraphic characteristics. In this study, both glacial and periglacial morphologies of the Puerto de Ventana have been identified and mapped, subsequently turning the information into a GIS and proceeding to the paleoglacial reconstruction and to the calculation of paleoELAs. The results show the existence of three stages in the glacial evolution of the area: Maximum Ice Extension Stage (MEH), Internal Stage and Cirque Stage. Through these phases the altitude of the paleoELAs goes from 1400-1557 in the MEH to 1515-1649 and 1650-1838 m in the following stages (depending on the method used). Likewise, from an initial glacial surface of 491.3 ha and an ice volume of 510.7 hm3 in the MEH, the second and third stages show a reduction of 90.25% and 96.28% in volume, respectively. Moreover, the study of periglacial morphodynamics allowed to identify both relict morphologies whose genesis is highly conditioned by the existing lithology in the area, and functional morphologies showing a weak geomorphological activity and a marked seasonal character compared to other areas of the Cantabrian Mountains. A pesar del avance reciente de los estudios sobre glaciarismo y periglaciarismo en las Montañas Cantábricas, el foco de las investigaciones se ha puesto en los conjuntos de mayor altitud, mientras áreas como el sector centro-occidental de la montaña asturiana han recibido menor atención. En este ámbito, el Puerto de Ventana constituye un área paradigmática debido a sus características altimétricas y litoestratigráficas. En este estudio se han identificado y cartografiado las formas de origen glaciar y periglaciar de la vertiente asturiana de dicho puerto, volcando ... |
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