Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica
V Congreso Geológico de España, 10-14 julio 2000, Alicante.-- 4 pages, 1 figure [EN] The Antarctic Peninsula Pacific Margin of Palmer Archipelago has been studied by means of EM12 multibeam high resolution bathymetry. In each fisiographic province, shelf, slope and continental rise, we have identifi...
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ftcsic:oai:digital.csic.es:10261/243990 2024-02-11T09:56:14+01:00 Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica Estrada, Ferran Canals, Miquel Ercilla, Gemma Alonso, Belén 2000-07 http://hdl.handle.net/10261/243990 es spa Sociedad Geológica Española https://sge.usal.es/archivos/GEO_TEMAS/Geotemas1_4sge.pdf Sí Geotemas 1(4): 135-137 (2000) 1576-5172 http://hdl.handle.net/10261/243990 none Antarctic Peninsula Till-delta High resolution Morphosedimentary features comunicación de congreso http://purl.org/coar/resource_type/c_5794 2000 ftcsic 2024-01-16T11:10:11Z V Congreso Geológico de España, 10-14 julio 2000, Alicante.-- 4 pages, 1 figure [EN] The Antarctic Peninsula Pacific Margin of Palmer Archipelago has been studied by means of EM12 multibeam high resolution bathymetry. In each fisiographic province, shelf, slope and continental rise, we have identified different morphosedimentary features. In the outer continental shelf there are two main progradational lobes over which an irregular sedimentary front identified as a till-delta is observed. The continental slope is very steep, reaching up to 22°, and is carved by short gullies that do not seems to erode the shelf break and the upper continental rise. In this latter physiographic province there are five sedimentary mounds of variable size and shape with a NW oriented crests. Between them develop four main channels responsible of the mound building. These channels are tributed by several feeding heads at the upper continental rise and by trough corridors initiated at the crest of the mounds. Also semicircular scars are identified in the continental rise, but mainly in the mound crests. All these morphosedimentary features of predominantly NW direction, probably are inherited of the past glacial periods. Nowadays, because the sedimentary conditions have changed, the continental rise is readjusting to a new situation by means of mound erosion through new erosive channels and sedimentary instability processes that follow a main NNE direction [ES] El margen continental pacífico de la Península Antàrtica es el resultado de la subducción de la placa tectónica de Fénix bajo la Antàrtica (Larter et al., 1997). Dicha subducción se paró durante el Mioceno y a partir de entonces el margen, que presenta características glaciares, ha ido progradando fundamentalmente durante los períodos en que el hielo avanzó hasta el borde de plataforma. En el glacis continental se han desarrollado hasta 12 montículos sedimentarios (Rebesco et al., 2000) que tradicionalmente han sido interpretados como producto de los procesos de ... Conference Object Antarc* Antarctic Antarctic Peninsula Palmer Archipelago Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Fénix ENVELOPE(-59.650,-59.650,-64.400,-64.400) Hielo ENVELOPE(-58.133,-58.133,-62.083,-62.083) Pacific Palmer Archipelago ENVELOPE(-62.833,-62.833,-64.250,-64.250) The Antarctic |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
Spanish |
topic |
Antarctic Peninsula Till-delta High resolution Morphosedimentary features |
spellingShingle |
Antarctic Peninsula Till-delta High resolution Morphosedimentary features Estrada, Ferran Canals, Miquel Ercilla, Gemma Alonso, Belén Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica |
topic_facet |
Antarctic Peninsula Till-delta High resolution Morphosedimentary features |
description |
V Congreso Geológico de España, 10-14 julio 2000, Alicante.-- 4 pages, 1 figure [EN] The Antarctic Peninsula Pacific Margin of Palmer Archipelago has been studied by means of EM12 multibeam high resolution bathymetry. In each fisiographic province, shelf, slope and continental rise, we have identified different morphosedimentary features. In the outer continental shelf there are two main progradational lobes over which an irregular sedimentary front identified as a till-delta is observed. The continental slope is very steep, reaching up to 22°, and is carved by short gullies that do not seems to erode the shelf break and the upper continental rise. In this latter physiographic province there are five sedimentary mounds of variable size and shape with a NW oriented crests. Between them develop four main channels responsible of the mound building. These channels are tributed by several feeding heads at the upper continental rise and by trough corridors initiated at the crest of the mounds. Also semicircular scars are identified in the continental rise, but mainly in the mound crests. All these morphosedimentary features of predominantly NW direction, probably are inherited of the past glacial periods. Nowadays, because the sedimentary conditions have changed, the continental rise is readjusting to a new situation by means of mound erosion through new erosive channels and sedimentary instability processes that follow a main NNE direction [ES] El margen continental pacífico de la Península Antàrtica es el resultado de la subducción de la placa tectónica de Fénix bajo la Antàrtica (Larter et al., 1997). Dicha subducción se paró durante el Mioceno y a partir de entonces el margen, que presenta características glaciares, ha ido progradando fundamentalmente durante los períodos en que el hielo avanzó hasta el borde de plataforma. En el glacis continental se han desarrollado hasta 12 montículos sedimentarios (Rebesco et al., 2000) que tradicionalmente han sido interpretados como producto de los procesos de ... |
format |
Conference Object |
author |
Estrada, Ferran Canals, Miquel Ercilla, Gemma Alonso, Belén |
author_facet |
Estrada, Ferran Canals, Miquel Ercilla, Gemma Alonso, Belén |
author_sort |
Estrada, Ferran |
title |
Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica |
title_short |
Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica |
title_full |
Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica |
title_fullStr |
Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica |
title_full_unstemmed |
Análisis morfosedimentario detallado del Margen Pacífico septentrional de la Península Antàrtica |
title_sort |
análisis morfosedimentario detallado del margen pacífico septentrional de la península antàrtica |
publisher |
Sociedad Geológica Española |
publishDate |
2000 |
url |
http://hdl.handle.net/10261/243990 |
long_lat |
ENVELOPE(-59.650,-59.650,-64.400,-64.400) ENVELOPE(-58.133,-58.133,-62.083,-62.083) ENVELOPE(-62.833,-62.833,-64.250,-64.250) |
geographic |
Antarctic Antarctic Peninsula Fénix Hielo Pacific Palmer Archipelago The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Fénix Hielo Pacific Palmer Archipelago The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Palmer Archipelago |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Palmer Archipelago |
op_relation |
https://sge.usal.es/archivos/GEO_TEMAS/Geotemas1_4sge.pdf Sí Geotemas 1(4): 135-137 (2000) 1576-5172 http://hdl.handle.net/10261/243990 |
op_rights |
none |
_version_ |
1790601577420029952 |