Abstract
The evidence for the existence and shape of the Montgomery Trough is reviewed. New data on slump fold asymmetry and facing directions confirm the presence of the eastern and, more significant, a western slope to the trough. The emplacement of the laterally derived slump sheets and axially transported turbidites is is analysed theoretically. Slump sheets could not have slid far on to a flat trough floor and probably formed a rise area at the slope base. The observed intercalation of slumps and turbidites could be due to the deposition of the turbidites on the rise by along-slope turbidity currents. Along-slope flow is possible either if turbidity currents ‘overflow’ the trough floor or ‘bank’ on to adjacent rises in a curved trough.
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