Abstract

For the first time, the existence of a meandering thalweg and associated point bars has been documented in detail for a mid-ocean channel. In the world's largest deep-sea channel, the Northwest Atlantic Mid-Ocean Channel of the Labrador Sea, average meander wave length of the thalweg is 50 km between lat 54° and 57°30′N. The ratio of the meander wave length to channel width is less than that for alluvial channels. Sediments recovered from the channel and natural levees are indicative of sedimentary mass transport in the channel by turbidity currents and related processes, some of which probably extended the entire length of the channel.

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