Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain

The migration of ridge and runnel systems on mícrotidal coasts is a rather simple process starting with the formation of a rídge at the uppcr shoreface after storms and its mígration landwards until it welds onto fue berm. This results in an ideal sequence of structures which ineludes (from bottom t...

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Detalhes bibliográficos
Autor: Dabrio González, Cristino José
Formato: artículo
Fecha de publicación:1982
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/64556
Acesso em linha:https://hdl.handle.net/20.500.14352/64556
Access Level:acceso abierto
Palavra-chave:Microtidal coasts
Mesotidal coasts
Sedimentology
Spain
Geología estratigráfica
2506.19 Estratigrafía
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repository_id_str
spelling Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. SpainDabrio González, Cristino JoséMicrotidal coastsMesotidal coastsSedimentologySpainGeología estratigráfica2506.19 EstratigrafíaThe migration of ridge and runnel systems on mícrotidal coasts is a rather simple process starting with the formation of a rídge at the uppcr shoreface after storms and its mígration landwards until it welds onto fue berm. This results in an ideal sequence of structures which ineludes (from bottom to top): cross-laminated sands (runnel facies); cross-bedded sands with local discontinuity surfaces (ridge facies); and even-laminated sands (berm facies). Larger tidal tange and higher wave activity on mesotidal coasts induce a mote differentiated pattern. At early stages of accretion, the ridge is covered at high tide and éxposed at low tide. Swash accumulates a secondary bar of coarse sediment during low water that is removed snd incorporated in the slip face of the ridge by avalanching during rising tídes. At high tide, large amounts of finer sedíment are brought by waves and deposíted on top of the rídge and in the slip face, generating fining-upward sequences. Erosional low-angle discontinuity surfaces develop during falling tides. Within the runnel, longshore currents are strong enough to build up small megaripples with crests roughly normal to the shoreline and waves induce wave ripples with crests more or less parallel to the shoreline. At later stages of accretion, the ridge is submerged mainly during spring high tide. After the runnel has been filled up, a vertical growth of the new berm occurs associated with finíng-upward sequences due to decreasing energy and shoreward shíftíng of swash zones, during the transition from neap to spring tides. The resulting ideal sequence of sedimentay structures is larger and better differentiated han those described for microtidal and tideless coasts.Elsevier Science B.V.Universidad Complutense de Madrid19821982-05-0119821982-05-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/64556reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/645562026-06-02T12:44:21Z
dc.title.none.fl_str_mv Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
title Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
spellingShingle Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
Dabrio González, Cristino José
Microtidal coasts
Mesotidal coasts
Sedimentology
Spain
Geología estratigráfica
2506.19 Estratigrafía
title_short Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
title_full Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
title_fullStr Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
title_full_unstemmed Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
title_sort Sedimentary structures gerenated on the foreshore by migrating ridge and runnel systems on microtidal and mesotidal coasts of S. Spain
dc.creator.none.fl_str_mv Dabrio González, Cristino José
author Dabrio González, Cristino José
author_facet Dabrio González, Cristino José
author_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv Microtidal coasts
Mesotidal coasts
Sedimentology
Spain
Geología estratigráfica
2506.19 Estratigrafía
topic Microtidal coasts
Mesotidal coasts
Sedimentology
Spain
Geología estratigráfica
2506.19 Estratigrafía
description The migration of ridge and runnel systems on mícrotidal coasts is a rather simple process starting with the formation of a rídge at the uppcr shoreface after storms and its mígration landwards until it welds onto fue berm. This results in an ideal sequence of structures which ineludes (from bottom to top): cross-laminated sands (runnel facies); cross-bedded sands with local discontinuity surfaces (ridge facies); and even-laminated sands (berm facies). Larger tidal tange and higher wave activity on mesotidal coasts induce a mote differentiated pattern. At early stages of accretion, the ridge is covered at high tide and éxposed at low tide. Swash accumulates a secondary bar of coarse sediment during low water that is removed snd incorporated in the slip face of the ridge by avalanching during rising tídes. At high tide, large amounts of finer sedíment are brought by waves and deposíted on top of the rídge and in the slip face, generating fining-upward sequences. Erosional low-angle discontinuity surfaces develop during falling tides. Within the runnel, longshore currents are strong enough to build up small megaripples with crests roughly normal to the shoreline and waves induce wave ripples with crests more or less parallel to the shoreline. At later stages of accretion, the ridge is submerged mainly during spring high tide. After the runnel has been filled up, a vertical growth of the new berm occurs associated with finíng-upward sequences due to decreasing energy and shoreward shíftíng of swash zones, during the transition from neap to spring tides. The resulting ideal sequence of sedimentay structures is larger and better differentiated han those described for microtidal and tideless coasts.
publishDate 1982
dc.date.none.fl_str_mv 1982
1982-05-01
1982
1982-05-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/64556
url https://hdl.handle.net/20.500.14352/64556
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier Science B.V.
publisher.none.fl_str_mv Elsevier Science B.V.
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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