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Morphology and development of a deep-sea meandering canyon (Boso Canyon) on an active plate margin, Sagami Trough, Japan
Soh, W.; Tokuyama, H.; Fujioka, K.; Kato, S.; Taira, A. (1990). Morphology and development of a deep-sea meandering canyon (Boso Canyon) on an active plate margin, Sagami Trough, Japan. Mar. Geol. 91(3): 227-241
In: Marine Geology. Elsevier: Amsterdam. ISSN 0025-3227, more
Peer reviewed article  

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Keywords
    Active margins; Bottom topography; Geological oceanography; Geological oceanography; Plate margins; Plate tectonics; Submarine canyons; Marine

Authors  Top 
  • Soh, W.
  • Tokuyama, H.
  • Fujioka, K.
  • Kato, S.
  • Taira, A.

Abstract
    The 100 km long Boso Canyon is located on a plate boundary in the Sagami Trough, off Boso Peninsula (central Japan). Large volumes of sediment from the Izu Collision Zone and adjacent volcanoes have been transported to the Sagami Trough and the Izu-Ogasawara Trench through the Boso Canyon. Boso Canyon displays a channel morphology ranging from low- (straight) to high-sinuosity (meandering) in the midstream. An abandoned channel is preserved on the bench along the downstream high-sinuosity channel. Quantitative analyses of the canyon morphology demonstrate that the Boso Canyon has definite similarities with meandering subaerial rivers, especially with entrenched meanders. Three morphological parameters, sinuosity, channel gradients and canyon gradients, suggest that the canyon slope appears to be compensated by an increase in sinuosity to maintain an optimum channel profile.

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