Shanmugam states, "direct observations of turbidity currents in the deep sea . . . have proven to be unsuccessful." Though this may have been true at one time, several recent expeditions have demonstrated otherwise. For instance, Johnson et al. (2001) documented the upper portions of a turbidity current in Monterey Canyon. Wave-influenced or wave-generated turbidity currents have been found in the upper portions of Eel Canyon (Puig et al. 2003) and offshore North Carolina (Wright et al. 2002). In fact, one of us (JDP) has personally observed (via an ROV) a dilute turbidity current associated with...

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