Mud sedimentation on the continental shelf at an accretionary margin—Poverty Bay, New Zealand

摘要: Abstract Sediments on the continental shelf, atop accretionary prism of eastern North Island, are dominated by mud. This situation reflects a highly erodible provenance soft Tertiary sediments, active tectonism, meteorological extremes, and, in historical times, changing land use. Off Poverty Bay, mud is supplied Waipaoa River, New Zealand's fourth largest river terms sediment supply. Under normal conditions, suspended dispersed as surface or hypopycnal plumes that have net northeastward southward dispersal along mainly response to prevailing wind‐driven circulation. During extreme floods with return periods 10 years more, fluvial concentrations probably high enough form subsurface hyperpycnal move and disperse under gravity shelf currents. After 100 year Cyclone Bola event 1988, reef communities inner were temporarily inundated fluid layer. Surficial sediments 3.5...