The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain)
During the Late Pleistocene, the main mountain ranges of the Iberian Peninsula were covered by small icefields and cirque and alpine glaciers. The deglaciation triggered paraglacial processes that generated landforms, mostly within the ice-free glacial cirques. In this research we analyse the deglac...
| Autores: | ; ; ; ; ; ; ; ; ; ; ; ; ; |
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| Tipo de documento: | Artigo |
| Data de publicação: | 2022 |
| País: | España |
| Recursos: | Universidad Complutense de Madrid (UCM) |
| Repositório: | Docta Complutense |
| Idioma: | Inglês |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/123386 |
| Acesso em linha: | https://hdl.handle.net/20.500.14352/123386 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | 911.2 550.93 551.3 551.4 Rock glacier Deglaciation Paraglacial processes Cosmic-Ray Exposure dating Bølling-Allerød interstadial Cantabrian Mountains Geografía física Geodinámica 2505.07 Geografía Física 2506.07 Geomorfología 2503.04 Geocronología y Radioisótopos 2506.09 Geología Glacial |
| _version_ | 1878742639068577793 |
|---|---|
| author | Santos-González, Javier |
| author2 | González-Gutiérrez, Rosa Blanca Redondo-Vega, José María Gómez-Villar, Amelia Jomelli, Vincent Fernández Fernández, José María De Andrés de Pablo, Nuria García-Ruiz, José María Peña-Pérez, Sergio Alberto Melón-Nava, Adrián Oliva, Marc Álvarez-Martínez, Javier Charton, Joanna Palacios Estremera, David |
| author2_role | author author author author author author author author author author author author author |
| author_browse | Charton, Joanna De Andrés de Pablo, Nuria Fernández Fernández, José María García-Ruiz, José María González-Gutiérrez, Rosa Blanca Gómez-Villar, Amelia Jomelli, Vincent Melón-Nava, Adrián Oliva, Marc Palacios Estremera, David Peña-Pérez, Sergio Alberto Redondo-Vega, José María Santos-González, Javier Álvarez-Martínez, Javier |
| author_facet | Santos-González, Javier González-Gutiérrez, Rosa Blanca Redondo-Vega, José María Gómez-Villar, Amelia Jomelli, Vincent Fernández Fernández, José María De Andrés de Pablo, Nuria García-Ruiz, José María Peña-Pérez, Sergio Alberto Melón-Nava, Adrián Oliva, Marc Álvarez-Martínez, Javier Charton, Joanna Palacios Estremera, David |
| author_role | author |
| collection | Docta Complutense |
| description | During the Late Pleistocene, the main mountain ranges of the Iberian Peninsula were covered by small icefields and cirque and alpine glaciers. The deglaciation triggered paraglacial processes that generated landforms, mostly within the ice-free glacial cirques. In this research we analyse the deglaciation process in the Muxivén Cirque (42°15′N – 6°16′W), in the upper Sil River Basin, which includes some of the largest relict rock glaciers of the Cantabrian Mountains. We addressed this objective by means of accurate geomorphological reconstructions, sedimentological analysis, Schmidt-hammer surface weathering measurements and a dataset of 10 10Be Cosmic-Ray Exposure ages. Results reveal that after ~16 ka, glaciers retreated to the bottom of the cirques at the headwaters of the valley, leaving the walls free of ice and triggering rock avalanches onto the remnants of these glaciers. This paraglacial process supplied debris to a small glacier within Muxivén Cirque, which transformed in two rock glaciers. These debris isolated the ice inside the rock glaciers only for a very short period of time and ended up melting completely before the Younger Dryas. The lower sector of the largest one stabilized at 14.5 ± 1.5 ka, while the upper sector remained active until 13.5 ± 0.8 ka. Previous to the stabilization of the lower sector of the northern rock glacier, at its margin a high-energy debris avalanche occurred at ~14.0 ± 0.9 ka. These data agree with previous research, corroborating the paraglacial origin of most Iberian rock glaciers during the Bølling-Allerød interstadial. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_f99210a7bc5a4dea721fe10a1eb93e9b |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/123386 |
| publishDate | 2022 |
| publishDateSort | 2022 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| reponame_str | Docta Complutense |
| spelling | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) Santos-González, Javier González-Gutiérrez, Rosa Blanca Redondo-Vega, José María Gómez-Villar, Amelia Jomelli, Vincent Fernández Fernández, José María De Andrés de Pablo, Nuria García-Ruiz, José María Peña-Pérez, Sergio Alberto Melón-Nava, Adrián Oliva, Marc Álvarez-Martínez, Javier Charton, Joanna Palacios Estremera, David 911.2 550.93 551.3 551.4 Rock glacier Deglaciation Paraglacial processes Cosmic-Ray Exposure dating Bølling-Allerød interstadial Cantabrian Mountains Geografía física Geodinámica 2505.07 Geografía Física 2506.07 Geomorfología 2503.04 Geocronología y Radioisótopos 2506.09 Geología Glacial During the Late Pleistocene, the main mountain ranges of the Iberian Peninsula were covered by small icefields and cirque and alpine glaciers. The deglaciation triggered paraglacial processes that generated landforms, mostly within the ice-free glacial cirques. In this research we analyse the deglaciation process in the Muxivén Cirque (42°15′N – 6°16′W), in the upper Sil River Basin, which includes some of the largest relict rock glaciers of the Cantabrian Mountains. We addressed this objective by means of accurate geomorphological reconstructions, sedimentological analysis, Schmidt-hammer surface weathering measurements and a dataset of 10 10Be Cosmic-Ray Exposure ages. Results reveal that after ~16 ka, glaciers retreated to the bottom of the cirques at the headwaters of the valley, leaving the walls free of ice and triggering rock avalanches onto the remnants of these glaciers. This paraglacial process supplied debris to a small glacier within Muxivén Cirque, which transformed in two rock glaciers. These debris isolated the ice inside the rock glaciers only for a very short period of time and ended up melting completely before the Younger Dryas. The lower sector of the largest one stabilized at 14.5 ± 1.5 ka, while the upper sector remained active until 13.5 ± 0.8 ka. Previous to the stabilization of the lower sector of the northern rock glacier, at its margin a high-energy debris avalanche occurred at ~14.0 ± 0.9 ka. These data agree with previous research, corroborating the paraglacial origin of most Iberian rock glaciers during the Bølling-Allerød interstadial. Elsevier https://hdl.handle.net/20.500.14352/123386 |
| spellingShingle | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) Santos-González, Javier 911.2 550.93 551.3 551.4 Rock glacier Deglaciation Paraglacial processes Cosmic-Ray Exposure dating Bølling-Allerød interstadial Cantabrian Mountains Geografía física Geodinámica 2505.07 Geografía Física 2506.07 Geomorfología 2503.04 Geocronología y Radioisótopos 2506.09 Geología Glacial |
| title | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) |
| title_full | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) |
| title_fullStr | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) |
| title_full_unstemmed | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) |
| title_short | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) |
| title_sort | The origin and collapse of rock glaciers during the bølling-allerød interstadial: a new study case from the cantabrian mountains (Spain) |
| topic | 911.2 550.93 551.3 551.4 Rock glacier Deglaciation Paraglacial processes Cosmic-Ray Exposure dating Bølling-Allerød interstadial Cantabrian Mountains Geografía física Geodinámica 2505.07 Geografía Física 2506.07 Geomorfología 2503.04 Geocronología y Radioisótopos 2506.09 Geología Glacial |
| topic_facet | 911.2 550.93 551.3 551.4 Rock glacier Deglaciation Paraglacial processes Cosmic-Ray Exposure dating Bølling-Allerød interstadial Cantabrian Mountains Geografía física Geodinámica 2505.07 Geografía Física 2506.07 Geomorfología 2503.04 Geocronología y Radioisótopos 2506.09 Geología Glacial |
| url | https://hdl.handle.net/20.500.14352/123386 |