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Geological Society, London, Memoirs

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Pockmarks in the fjords of Chilean Patagonia

J. A. Dowdeswell, E. K. Dowdeswell and C. Rodrigo
Geological Society, London, Memoirs, 46, 109-110, 30 November 2016, https://doi.org/10.1144/M46.159
J. A. Dowdeswell
1Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER, UK
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E. K. Dowdeswell
1Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER, UK
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C. Rodrigo
2Department of Geology, Andrés Bello University, Quillota 980, Viña del Mar, Chile
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The fjords of Chilean Patagonia are areas of relatively rapid Holocene sediment delivery from glacial, glacifluvial and fluvial systems. These systems are fed by substantial ice- and snow-melt on the flanks of the Andean mountains. Many fjords are infilled by tens of metres of fine-grained, acoustically laminated sediment leading to a relatively flat and undifferentiated appearance of the fjord floor except where mass-wasting and turbidity-current processes are operating (e.g. DaSilva et al. 1997; Araya-Vergara 1999, 2008; Boyd et al. 2008; Dowdeswell & Vásquez 2013). In some areas, pockmarks have been observed on the floor of fjords, whose origin has been linked to the escape of fluids from the underlying sediments.

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During the analysis and interpretation of almost 27 000 km2 of multibeam-bathymetric imagery from the fjords of Chilian Patagonia between 47° 35′ S and 50° 17′ S (Fig. 1a), several relatively small areas of the fjord floor were identified as containing crater-like pockmarks (Dowdeswell & Vásquez …

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Geological Society, London, Memoirs: 46 (1)
Geological Society, London, Memoirs
Volume 46
2016
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Pockmarks in the fjords of Chilean Patagonia

J. A. Dowdeswell, E. K. Dowdeswell and C. Rodrigo
Geological Society, London, Memoirs, 46, 109-110, 30 November 2016, https://doi.org/10.1144/M46.159
J. A. Dowdeswell
1Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER, UK
  • Find this author on Google Scholar
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  • For correspondence: [email protected]
E. K. Dowdeswell
1Scott Polar Research Institute, University of Cambridge, Cambridge CB2 1ER, UK
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C. Rodrigo
2Department of Geology, Andrés Bello University, Quillota 980, Viña del Mar, Chile
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Pockmarks in the fjords of Chilean Patagonia

J. A. Dowdeswell, E. K. Dowdeswell and C. Rodrigo
Geological Society, London, Memoirs, 46, 109-110, 30 November 2016, https://doi.org/10.1144/M46.159
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