Extensive stratified flow deposits are present within a drumlin exposed on the eastern shore of Donegal Bay, northwest Ireland. The stratified deposits are located towards the central lee portion of the drumlin infilling a major depression within a basal diamicton association, and are overlain by a sand-rich diamicton association. The stratified sequence consists of laminated silts, cohesive diamictic muds, stratified diamictons, well sorted massive sands and clast-supported gravels. A discernible upward vertical facies transition, is apparent within the stratified deposits, from fines and matrix-dominant sediments to well sorted clastic sediments. These facies variations appear to reflect increased hydrodynamic activity and a prograding sequence. The sediments are interpreted as a subglacial conduit infill, formed at the point of debouchure into a glaciomarine environment. The envisaged increase in water availability and flow energy may have resulted from progressive enlargement of the conduit by basal melting and scouring associated with the water/sediment flux within the conduit. The depression in the basal diamicton association appears to have resulted from scour at the base of the conduit.