Puntas cuspidadas holocenicas en el Estrecho de Magallanes, sur de Chile.
Holocene cuspate forelands in the Strait of Magellan southern Chile
| dc.contributor | en-US | |
| dc.contributor | es-ES | |
| dc.creator | Fontolan, Giorgio | |
| dc.creator | Simeoni, Umberto | |
| dc.date | 2010-07-05 | |
| dc.identifier | http://www.andeangeology.cl/index.php/revista1/article/view/V26n2-a03 | |
| dc.identifier | 10.5027/andgeoV26n2-a03 | |
| dc.description | La boca oriental del Estrecho de Magallanes se caracteriza por la presencia de dos puntas cuspidadas truncadas, que son las morfologias tipicas de un fuerte fenomeno de acrecion litoral de alta energia. Ambos promontorios, Punta Catalina del lado de la Tierra del Fuego y Punta Dungeness del lado de la Patagonia, muestran la misma topografia y las mismas caracteristicas de acrecion, y podrian haberse formado y desarrollado al mismo tiempo durante la fase regresiva del Holoceno tardio. El analisis de fotografias aereas junto con el trabajo de terreno han permitido a los autores distinguir nueve fases de acrecion diferentes en Punta Catalina. Cada fase esta marcada por un amplio sistema de bermas de playa y el consiguiente desarrollo de marismas detras de la playa. La fuerte accion eolica sobre los antiguos sistemas de bermas se caracteriza por surcos y cuencas de deflacion y por la presencia de un extenso campo de dunas parabolicas. Aunque faltan dataciones, se ha tratado de reconstruir la evolucion del sistema, ya sea por la evidencia de una fuerte similitud con Punta Dungeness como por el contexto evolutivo holocenico de formas analogas costeras de acrecion en Sudamerica. | es-ES |
| dc.description | The eastern inlet of the Strait of Magellan is characterised by the presence of two truncate cuspate forelands, typically high-energy accretionary morphologies. Both forelands, Punta Catalina on the Fuegian side and Punta Dungeness on the Patagonian side, show similar features and accretionary trends and could have been formed and developed at the same time during the late Holocene regressive phase. On the basis of air-photo interpretation, together with field survey, almost nine different accretionary phases of Punta Catalina spit can be recognised. Each phase is marked by an extensive beach-ridge system, and subsequent back-barrier mud-flat and marsh development. The coastal retreat and erosion processes along the Atlantic side are responsible for the shifting and morphological readjustment of the spit, which tends to prograde towards the opposite direction. The strong eolian modelling over ancient beach-ridge systems, is marked by deflation furrows, hollows and nikes and subsequent construction of elongate parabolic dunes. Despite the lack of datings, a reconstruction of the system evolution was attempted, allowed by the evidence of a strong similarity with the Dungeness foreland and considering the evolutionary framework of analogous accretionary coastal forms in South America during late Holocene. | en-US |
| dc.format | application/pdf | |
| dc.format | text/html | |
| dc.language | eng | |
| dc.publisher | Servicio Nacional de Geología y Minería | en-US |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V26n2-a03/927 | |
| dc.relation | http://www.andeangeology.cl/index.php/revista1/article/view/V26n2-a03/html | |
| dc.source | Andean Geology; Vol 26, No 2 (1999); 175-186 | es-ES |
| dc.source | Andean Geology; Vol 26, No 2 (1999); 175-186 | en-US |
| dc.source | 0718-7106 | |
| dc.source | 0718-7092 | |
| dc.title | Puntas cuspidadas holocenicas en el Estrecho de Magallanes, sur de Chile. | es-ES |
| dc.title | Holocene cuspate forelands in the Strait of Magellan southern Chile | en-US |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | es-ES | |
| dc.type | en-US |
This item appears in the following Collection(s)
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Andean Geology
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