Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area
[EN] The objective of this study was to assess whether it is possible to obtain a comprehensive record of the last deglaciation from the small Peña Negra glacial cirque in a marginal mountain range in the Iberian Range (northern Iberian Peninsula). The cirque is located in Sierra Cebollera, at an el...
| Autores: | , , , , , , , , , |
|---|---|
| Tipo de documento: | artigo |
| Estado: | Versão publicada |
| Data de publicação: | 2020 |
| País: | España |
| Recursos: | Universidad de León |
| Repositório: | BULERIA. Repositorio Institucional de la Universidad de León |
| OAI Identifier: | oai:buleria.unileon.es:10612/25858 |
| Acesso em linha: | https://www.sciencedirect.com/science/article/pii/S0169555X20301677 https://hdl.handle.net/10612/25858 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Geografía Geología Deglaciation Marginal mountains Rock glacier Cosmogenic exposure dating Sierra Cebollera Iberian Range 2506.09 Geología Glacial 2505.07 Geografía Física |
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Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain areaGarcía-Ruiz, José M.Palacios, DavidFernández-Fernández, José M.Andrés, NuriaArnáez, JoséGómez Villar, AmeliaSantos González, JavierÁlvarez-Martínez, JavierLana-Renault, NoemíLéanni, LaëtitiaGeografíaGeologíaDeglaciationMarginal mountainsRock glacierCosmogenic exposure datingSierra CebolleraIberian Range2506.09 Geología Glacial2505.07 Geografía Física[EN] The objective of this study was to assess whether it is possible to obtain a comprehensive record of the last deglaciation from the small Peña Negra glacial cirque in a marginal mountain range in the Iberian Range (northern Iberian Peninsula). The cirque is located in Sierra Cebollera, at an elevation slightly over 2000 m a.s.l. in the divide, and has relatively low elevational difference between its uppermost and lowest parts. The Peña Negra glacial cirque was selected because of the presence of several lateral moraines indicating the occurrence of a glacial tongue of 1.8 km length and a small rock glacier, enabling identification of the main glacial stages that affected the paleo-evolution of the glacier. Using cosmogenic exposure dating techniques and geomorphological mapping it was possible to reconstruct the historical Peña Negra glacier and to distinguish: (i) the maximum ice extent (MIE) at approximately 18–20 ka, coinciding with the Global Last Glacial Maximum (GLGM), although the occurrence of a previous stage was not ruled out; (ii) a stage of glacial re-advance at 16–17 ka, coinciding with the Oldest Dryas, followed by rapid ice melting; (iii) the development of a rock glacier in a minor structural cirque near the headwall at 14–15 ka, when paraglacial processes were probably dominant; and (iv) evidence of ice melting in the uppermost cirque at 13.5 ka. Study of the Peña Negra glacier revealed the history of a minor valley glacier affected by distinct stages, including the formation of a small rock glacier in the final phases of deglaciation. No evidence of a Younger Dryas re-advance was found.SIThis research was supported by the ESPAS Project (CGL2015-65569-R) and Mountain Warming Project (CGL2015-65813-R), funded by the MINECO-FEDER, Spanish Government. “The French AMS national facility ASTER (CEREGE, Aix en Provence) is supported by the INSU/CNRS, the ANR through the “Projets thématiques d'excellence“ program for the “Equipements d'excellence“ ASTER-CEREGE action and IRD.”. We thank Irene Schimmelpfennig for her support to carry out this work.ElsevierGeografia FisicaFacultad de Filosofia y Letras2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://www.sciencedirect.com/science/article/pii/S0169555X20301677https://hdl.handle.net/10612/25858reponame:BULERIA. Repositorio Institucional de la Universidad de Leóninstname:Universidad de LeónInglésinfo:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+i Orientado a los Retos de la Sociedad/CGL2015-65569-Rinfo:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+i Orientado a los Retos de la Sociedad/CGL2015-65813-Rinfo:eu-repo/semantics/openAccessoai:buleria.unileon.es:10612/258582026-06-24T12:43:27Z |
| dc.title.none.fl_str_mv |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| title |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| spellingShingle |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area García-Ruiz, José M. Geografía Geología Deglaciation Marginal mountains Rock glacier Cosmogenic exposure dating Sierra Cebollera Iberian Range 2506.09 Geología Glacial 2505.07 Geografía Física |
| title_short |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| title_full |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| title_fullStr |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| title_full_unstemmed |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| title_sort |
Glacial stages in the Peña Negra valley, Iberian Range, northern Iberian Peninsula: Assessing the importance of the glacial record in small cirques in a marginal mountain area |
| dc.creator.none.fl_str_mv |
García-Ruiz, José M. Palacios, David Fernández-Fernández, José M. Andrés, Nuria Arnáez, José Gómez Villar, Amelia Santos González, Javier Álvarez-Martínez, Javier Lana-Renault, Noemí Léanni, Laëtitia |
| author |
García-Ruiz, José M. |
| author_facet |
García-Ruiz, José M. Palacios, David Fernández-Fernández, José M. Andrés, Nuria Arnáez, José Gómez Villar, Amelia Santos González, Javier Álvarez-Martínez, Javier Lana-Renault, Noemí Léanni, Laëtitia |
| author_role |
author |
| author2 |
Palacios, David Fernández-Fernández, José M. Andrés, Nuria Arnáez, José Gómez Villar, Amelia Santos González, Javier Álvarez-Martínez, Javier Lana-Renault, Noemí Léanni, Laëtitia |
| author2_role |
author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Geografia Fisica Facultad de Filosofia y Letras |
| dc.subject.none.fl_str_mv |
Geografía Geología Deglaciation Marginal mountains Rock glacier Cosmogenic exposure dating Sierra Cebollera Iberian Range 2506.09 Geología Glacial 2505.07 Geografía Física |
| topic |
Geografía Geología Deglaciation Marginal mountains Rock glacier Cosmogenic exposure dating Sierra Cebollera Iberian Range 2506.09 Geología Glacial 2505.07 Geografía Física |
| description |
[EN] The objective of this study was to assess whether it is possible to obtain a comprehensive record of the last deglaciation from the small Peña Negra glacial cirque in a marginal mountain range in the Iberian Range (northern Iberian Peninsula). The cirque is located in Sierra Cebollera, at an elevation slightly over 2000 m a.s.l. in the divide, and has relatively low elevational difference between its uppermost and lowest parts. The Peña Negra glacial cirque was selected because of the presence of several lateral moraines indicating the occurrence of a glacial tongue of 1.8 km length and a small rock glacier, enabling identification of the main glacial stages that affected the paleo-evolution of the glacier. Using cosmogenic exposure dating techniques and geomorphological mapping it was possible to reconstruct the historical Peña Negra glacier and to distinguish: (i) the maximum ice extent (MIE) at approximately 18–20 ka, coinciding with the Global Last Glacial Maximum (GLGM), although the occurrence of a previous stage was not ruled out; (ii) a stage of glacial re-advance at 16–17 ka, coinciding with the Oldest Dryas, followed by rapid ice melting; (iii) the development of a rock glacier in a minor structural cirque near the headwall at 14–15 ka, when paraglacial processes were probably dominant; and (iv) evidence of ice melting in the uppermost cirque at 13.5 ka. Study of the Peña Negra glacier revealed the history of a minor valley glacier affected by distinct stages, including the formation of a small rock glacier in the final phases of deglaciation. No evidence of a Younger Dryas re-advance was found. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
| dc.identifier.none.fl_str_mv |
https://www.sciencedirect.com/science/article/pii/S0169555X20301677 https://hdl.handle.net/10612/25858 |
| url |
https://www.sciencedirect.com/science/article/pii/S0169555X20301677 https://hdl.handle.net/10612/25858 |
| dc.language.none.fl_str_mv |
Inglés |
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Inglés |
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info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+i Orientado a los Retos de la Sociedad/CGL2015-65569-R info:eu-repo/grantAgreement/MINECO/Programa Estatal de I+D+i Orientado a los Retos de la Sociedad/CGL2015-65813-R |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Elsevier |
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Elsevier |
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Universidad de León |
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