Criterios geomorfológicos sobre actividad tectónica reciente a lo largo de la Costa Recta, Isla Decepción (Antártida Occidental)
- R. Pérez López 1
- F. Fernández Ibáñez 2
- J.J. Martínez Díaz 3
- C. Paredes 4
- J.L. Giner 3
- A. Caselli 5
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1
Universidad CEU San Pablo
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- 2 Instituto Andaluz de Geofísica
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3
Universidad Complutense de Madrid
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4
Universidad Politécnica de Madrid
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5
Universidad de Buenos Aires
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ISSN: 1576-5172
Ano de publicación: 2004
Título do exemplar: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)
Número: 6
Páxinas: 179-182
Tipo: Artigo
Outras publicacións en: Geotemas (Madrid)
Resumo
Several active tectonic evidences are observed along Costa Recta, located eastward of Deception Island (western Antarctica): marine terraces and fluvial streams cutting a relict glacier. The height of both landforms decrease southward from Macaroni Point, appointing to a tilt movement across a fault plane. Fault planes were measured at Macaroni Point and Baily Head, with a main NNWSSE orientation, similar to the Costa Recta strike. From several scales o f measure, the orientation of the beach was established in two principal segments: N168QE, and N173QE. On the other hand, the beach and glacier dynamics and sedimentary deposits were studied. According to the morpho-tectonic analysis, we conclude that the Costa Recta beach is a retreat scarp of a submarine fault oriented NNW-SSE and located in the Bransfield Strait, although a geophysical study of the marine bottom is needed to map the fault trace in an accurate way.