Channel Bank Recession in the Bahia Blanca Estuary, Argentina

Silvia S. Ginsberg, Gerardo M. E Perillo

Abstract


Rotational slumping structures, termed "erosion cusps" herein, are common structures on the tidal channel banks of the Bahia Blanca Estuary, Argentina. The faulting and later slumping of the material are produced mainly by unstable channel banks with slopes as great as 50°. Other factors affecting the stability of the banks include the variability of sediment composition and cohesiveness, bioturbation, and mechanical fatigue due to small wind waves and ship wakes.



Keywords


Erosion cusps; tidal channels; slumping; sediment composition; shear strength; tidal flats

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