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Survival of a submarine canyon during long-term outbuilding of a continental margin

Publication ,  Journal Article
Amblas, D; Gerber, TP; De Mol, B; Urgeles, R; Garcia-Castellanos, D; Canals, M; Pratson, LF; Robb, N; Canning, J
Published in: Geology
June 1, 2012

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. © 2012 Geological Society of America.

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Published In

Geology

DOI

EISSN

1943-2682

ISSN

0091-7613

Publication Date

June 1, 2012

Volume

40

Issue

6

Start / End Page

543 / 546

Related Subject Headings

  • Geochemistry & Geophysics
  • 37 Earth sciences
  • 04 Earth Sciences
 

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Amblas, D., Gerber, T. P., De Mol, B., Urgeles, R., Garcia-Castellanos, D., Canals, M., … Canning, J. (2012). Survival of a submarine canyon during long-term outbuilding of a continental margin. Geology, 40(6), 543–546. https://doi.org/10.1130/G33178.1
Amblas, D., T. P. Gerber, B. De Mol, R. Urgeles, D. Garcia-Castellanos, M. Canals, L. F. Pratson, N. Robb, and J. Canning. “Survival of a submarine canyon during long-term outbuilding of a continental margin.” Geology 40, no. 6 (June 1, 2012): 543–46. https://doi.org/10.1130/G33178.1.
Amblas D, Gerber TP, De Mol B, Urgeles R, Garcia-Castellanos D, Canals M, et al. Survival of a submarine canyon during long-term outbuilding of a continental margin. Geology. 2012 Jun 1;40(6):543–6.
Amblas, D., et al. “Survival of a submarine canyon during long-term outbuilding of a continental margin.” Geology, vol. 40, no. 6, June 2012, pp. 543–46. Scopus, doi:10.1130/G33178.1.
Amblas D, Gerber TP, De Mol B, Urgeles R, Garcia-Castellanos D, Canals M, Pratson LF, Robb N, Canning J. Survival of a submarine canyon during long-term outbuilding of a continental margin. Geology. 2012 Jun 1;40(6):543–546.

Published In

Geology

DOI

EISSN

1943-2682

ISSN

0091-7613

Publication Date

June 1, 2012

Volume

40

Issue

6

Start / End Page

543 / 546

Related Subject Headings

  • Geochemistry & Geophysics
  • 37 Earth sciences
  • 04 Earth Sciences