Survival of a submarine canyon during long-term outbuilding of a continental margin
4 pages, 3 figures
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Geological Society of America
2012-04
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| Online Access: | http://hdl.handle.net/10261/75172 |
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dig-icm-es-10261-751722020-11-26T18:45:39Z Survival of a submarine canyon during long-term outbuilding of a continental margin Amblas, David Gerber, Thomas P. De Mol, Ben Urgeles, Roger García-Castellanos, Daniel Canals, Miquel Pratson, Lincoln F. Robb, N. Canning, Jason 4 pages, 3 figures Net-depositional submarine canyons are common in continental slope strata, but how they survive and prograde on constructional margins is poorly understood. In this study we present field evidence for the coevolution of a submarine canyon and the adjacent continental slope. Using a three-dimensional seismic data cube that images the Ebro margin (northwest Mediterranean), we identify a preserved canyon on a middle Pleistocene paleosurface and relate it directly to its expression on the present-day seafloor. A subparallel stacking pattern of seismic reflectors, similar to that seen between prograding clinoforms in intercanyon areas, is observed between the modern and paleocanyon thalwegs. The concavity of the modern long profile differs from the convex-concave long profile on the middle Pleistocene surface, suggesting a long-term change in canyon sedimentation. We interpret this change as a shift to a canyon dominated by turbidity currents from one strongly influenced by the pattern of sedimentation that built the open-slope canyon interfluves. We find support for our interpretation in previous studies of the Ebro margin The work was funded by Ministerio de Ciencia e Innovación (MICINN) through project EDINSED3D (CTM2007-64880/MAR). Amblas acknowledges additional financial support from the European Commission Seventh Framework Programme through project HERMIONE (EC contract 226354), and from the Spanish I+D+I projects GRACCIE-CONSOLIDER (CSD2007-00067), DOS MARES (CTM2010-21810-C03-01/MAR), and TopoMed (CGL2008-03474-E/BTE). We acknowledge support from Seismic Microtechnologies for Kingdom Suite Educational License Grant and to dGB Earth Sciences for providing access to Opendtect software. The Generalitat de Catalunya is acknowledged for support through Grups de Recerca Consolidats grants 2009-SGR-146 and 2009-SGR-1305 Peer reviewed 2013-04-26T08:34:47Z 2013-04-26T08:34:47Z 2012-04 artículo http://purl.org/coar/resource_type/c_6501 Geology 40(6): 543-546 (2012) 0091-7613 http://hdl.handle.net/10261/75172 10.1130/G33178.1 1943-2682 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/226354 https://doi.org/10.1130/G33178.1 open Geological Society of America |
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Biblioteca del ICM España |
| language |
English |
| description |
4 pages, 3 figures |
| format |
artículo |
| author |
Amblas, David Gerber, Thomas P. De Mol, Ben Urgeles, Roger García-Castellanos, Daniel Canals, Miquel Pratson, Lincoln F. Robb, N. Canning, Jason |
| spellingShingle |
Amblas, David Gerber, Thomas P. De Mol, Ben Urgeles, Roger García-Castellanos, Daniel Canals, Miquel Pratson, Lincoln F. Robb, N. Canning, Jason Survival of a submarine canyon during long-term outbuilding of a continental margin |
| author_facet |
Amblas, David Gerber, Thomas P. De Mol, Ben Urgeles, Roger García-Castellanos, Daniel Canals, Miquel Pratson, Lincoln F. Robb, N. Canning, Jason |
| author_sort |
Amblas, David |
| title |
Survival of a submarine canyon during long-term outbuilding of a continental margin |
| title_short |
Survival of a submarine canyon during long-term outbuilding of a continental margin |
| title_full |
Survival of a submarine canyon during long-term outbuilding of a continental margin |
| title_fullStr |
Survival of a submarine canyon during long-term outbuilding of a continental margin |
| title_full_unstemmed |
Survival of a submarine canyon during long-term outbuilding of a continental margin |
| title_sort |
survival of a submarine canyon during long-term outbuilding of a continental margin |
| publisher |
Geological Society of America |
| publishDate |
2012-04 |
| url |
http://hdl.handle.net/10261/75172 |
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1777665880070553600 |