Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits

Detalhes bibliográficos
Autor(a) principal: Oliva, Marc
Data de Publicação: 2011
Outros Autores: Ortiz, A. Gómez
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/37886
Resumo: The activity of geomorphic processes in the current periglacial belt of Sierra Nevada during the Holocene has been strongly controlled by climate variability. We examined two sedimentary records showing several cycles with varying intensity of slope processes in the massif. Chronostratigraphic studies of solifluction landforms have revealed seven cycles of enhanced slope activity in Sierra Nevada during the last 7 ka. Lake sediments show eight periods with increased slope activity over the last 6 ka. Depending on temperature and moisture regime, erosion or conditions of slope stability prevailed. Cold and wet periods triggered slope processes and favoured deposition of coarse-grained sediments into the lakes, whereas warm phases were prone to soil development and fine-grained sedimentation in the lakes. The lake sediments also show evidence for an increasing aridity trend since the Holocene Optimum Warm Period in Sierra Nevada, which induced a shift of solifluction processes to higher elevations accompanying late-lying snow patches.
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spelling Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake depositsHaloceneSedimentological analysisSlope dynamicsLake depositsSierra NevadaSpainThe activity of geomorphic processes in the current periglacial belt of Sierra Nevada during the Holocene has been strongly controlled by climate variability. We examined two sedimentary records showing several cycles with varying intensity of slope processes in the massif. Chronostratigraphic studies of solifluction landforms have revealed seven cycles of enhanced slope activity in Sierra Nevada during the last 7 ka. Lake sediments show eight periods with increased slope activity over the last 6 ka. Depending on temperature and moisture regime, erosion or conditions of slope stability prevailed. Cold and wet periods triggered slope processes and favoured deposition of coarse-grained sediments into the lakes, whereas warm phases were prone to soil development and fine-grained sedimentation in the lakes. The lake sediments also show evidence for an increasing aridity trend since the Holocene Optimum Warm Period in Sierra Nevada, which induced a shift of solifluction processes to higher elevations accompanying late-lying snow patches.The Geological Society of LondonRepositório da Universidade de LisboaOliva, MarcOrtiz, A. Gómez2019-04-08T15:17:53Z20112011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10451/37886engOliva, M., & Ortiz, A. G. (2011). Holocene slope dynamics in Sierra Nevada (south Spain). Sedimentological analysis of solifluction landforms and lake deposits. Geological Society, London, Special Publications, 354(1), 227-239. Doi: 10.1144/SP354.150305-871910.1144/SP354.15metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T16:35:17Zoai:repositorio.ul.pt:10451/37886Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:51:50.830611Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
title Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
spellingShingle Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
Oliva, Marc
Halocene
Sedimentological analysis
Slope dynamics
Lake deposits
Sierra Nevada
Spain
title_short Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
title_full Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
title_fullStr Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
title_full_unstemmed Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
title_sort Holocene slope dynamics in Sierra Nevada (south Spain): sedimentological analysis of solifluction landforms and lake deposits
author Oliva, Marc
author_facet Oliva, Marc
Ortiz, A. Gómez
author_role author
author2 Ortiz, A. Gómez
author2_role author
dc.contributor.none.fl_str_mv Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Oliva, Marc
Ortiz, A. Gómez
dc.subject.por.fl_str_mv Halocene
Sedimentological analysis
Slope dynamics
Lake deposits
Sierra Nevada
Spain
topic Halocene
Sedimentological analysis
Slope dynamics
Lake deposits
Sierra Nevada
Spain
description The activity of geomorphic processes in the current periglacial belt of Sierra Nevada during the Holocene has been strongly controlled by climate variability. We examined two sedimentary records showing several cycles with varying intensity of slope processes in the massif. Chronostratigraphic studies of solifluction landforms have revealed seven cycles of enhanced slope activity in Sierra Nevada during the last 7 ka. Lake sediments show eight periods with increased slope activity over the last 6 ka. Depending on temperature and moisture regime, erosion or conditions of slope stability prevailed. Cold and wet periods triggered slope processes and favoured deposition of coarse-grained sediments into the lakes, whereas warm phases were prone to soil development and fine-grained sedimentation in the lakes. The lake sediments also show evidence for an increasing aridity trend since the Holocene Optimum Warm Period in Sierra Nevada, which induced a shift of solifluction processes to higher elevations accompanying late-lying snow patches.
publishDate 2011
dc.date.none.fl_str_mv 2011
2011-01-01T00:00:00Z
2019-04-08T15:17:53Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/37886
url http://hdl.handle.net/10451/37886
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Oliva, M., & Ortiz, A. G. (2011). Holocene slope dynamics in Sierra Nevada (south Spain). Sedimentological analysis of solifluction landforms and lake deposits. Geological Society, London, Special Publications, 354(1), 227-239. Doi: 10.1144/SP354.15
0305-8719
10.1144/SP354.15
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The Geological Society of London
publisher.none.fl_str_mv The Geological Society of London
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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