Characteristics and origins of lee-side stratification sequences in late pleistocene drumlins, northern Ireland

GF DARDIS, AM MCCABE, WI MITCHELL

    Research output: Contribution to journalArticle

    53 Citations (Scopus)

    Abstract

    Spindle- and parabolic-shaped drumlins examined at fifty-five localities in northern Ireland possess stratification sequences on their lee-side flanks. These forms lack the distinctive steep stoss- and tapering lee-ends of classical drumlins and tend to occur in linear zones transverse to late Pleistocene ice-flow. In most cases (90 per cent) the stratified deposits infill embayments excavated in the lee-side of barkhanoid forms and, in the remainder (10 per cent), they are superimposed on the lee-side of whaleback forms. The stratification sequences developed as a result of sedimentation in interconnected subglacial water-filled cavities and are unlike remanie proglacial sediments moulded by ice into drumlin form. Stratigraphic evidence indicates that the lee-side sequences developed during drumlin streamlining, which supports the view that subglacial hydraulic processes played an important role in drumlin formation.
    Original languageEnglish
    Pages (from-to)409-424
    JournalEarth Surface Processes and Landforms
    Volume9
    Issue number5
    DOIs
    Publication statusPublished - Sep 1984

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