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Criterios geomorfológicos sobre actividad tectónica reciente a lo largo de la Costa Recta, Isla Decepción (Antártida Occidental)

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Pérez-López, R. and Fernández-Ibáñez, F. and Martínez Díaz, José J. and Paredes, C. and Giner Robles, Jorge L. and Caselli, A. (2004) Criterios geomorfológicos sobre actividad tectónica reciente a lo largo de la Costa Recta, Isla Decepción (Antártida Occidental). Geotemas, 6 (3). ISSN 1576-5172

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Abstract

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 o f the marine bottom is needed to map the fault trace in an accurate way.


Item Type:Article
Uncontrolled Keywords:Morphotectonic, Marine terraces, Fluvial network, Submarine fault, Antarctica
Subjects:Sciences > Geology > Geodynamics
ID Code:60828
Deposited On:09 Jun 2020 11:14
Last Modified:09 Jun 2020 11:14

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