Demise of a submarine canyon? Evidence for highstand infilling on the Waipaoa River continental margin, New Zealand

Details Demise of a submarine canyon? Evidence for highstand infilling on the Waipaoa River continental margin, New Zealand Demise of a submarine canyon? Evidence for highstand infilling on the Waipaoa River continental margin, New Zealand

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3420606w&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 20, CiteID L20606

Mathematics

Logic

Marine Geology And Geophysics: Continental Shelf And Slope Processes (4219), Oceanography: Biological And Chemical: Sedimentation (1861), Marine Geology And Geophysics: Marine Seismics (0935, 7294), Marine Geology And Geophysics: Marine Sediments: Processes And Transport

Scientific paper

Submarine canyons are major geomorphologic features on the Earth's surface. Their formation has received considerable debate, but their demise has received less attention. Research of modern canyons with cores and moorings has documented active sediment transport and deposition, but extrapolation of these local observations over larger areas is precluded by complex canyon geomorphology. High-resolution multibeam and chirp data presented here provide convincing evidence of an infilling canyon head on the Waipaoa River margin of New Zealand. Tens of meters of Holocene sediment have accumulated on the outer shelf and in Lachlan canyon as a result of off-shelf sediment transport. Regardless of the ultimate fate of this system over geological time scales, this research demonstrates highstand sedimentation as a possible mechanism for canyon burial and cause of canyon demise, which has important implications for the evolution of canyons globally.

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