Abstract
The presence of Mytilus Seamount within the axis of the Western Boundary Undercurrent of the North Atlantic has modified the bottom water's flow pattern (measured by four current meters) and thermal structure (measured by a thermometer attached to a deeply towed instrument package). Attempts at bottom photography indicate that very high concentrations of suspended matter are present within a layer of isothermal ( θ = 1·7° C) bottom water which covers the rise locally at the foot of the northern slopes of the seamount. Erosional channels up to 50 m deep have been incised into Pleistocene and Holocene continental rise sediments. The sediment-covered crest of the seamount is overlain by clear water and exhibits bedforms and truncated sediment horizons indicating strong scour by dominantly tidal currents.
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