Upper pleistocene facies sequences and relative sea-level trends along the south coast of Ireland

AM McCabe, C OCofaigh

    Research output: Contribution to journalArticle

    27 Citations (Scopus)

    Abstract

    Upper Pleistocene sequences, deposited around 20 ka provide a record of sedimentation during the last glacial/deglacial cycle along the south coast of Ireland. A stratigraphy based on eight lithofacies associations is recognized. Typically, the facies sequences overlie a glaciated shore platform furrowed by subglacial meltwaters. Elements within the stratigraphy comprise: (1) ice advance southwards onto the continental shelf; (2) stagnation-zone retreat triggered by rising sea level related to isostatic depression coupled with subglacial meltwater events that furrowed the platform; (3) progressive rise in relative sea level recorded by a submergent facies sequence on an isostatically depressed slope (beach gravels -->2 subaqueous jet afflux sediments -->2 wave-influenced sands -->2 glaciomarine mud drape); ice-marginal oscillation is recorded by glaciotectonically deformed gravels, sands, and foliated diamict; (4) terrestrial emergence is marked by angular breccias derived from local slopes by periglacial weathering. There is a clear facies transition between the breccias and underlying wave-influenced sands. Facies sequences suggest that the local deglacial cycle was out of phase with the global eustatic cycle along the south coast of Ireland. Stagnation-zone retreat was largely dependent on magnitudes of isostatic depression, high relative sea level, and meltwater events, and not on climatic forcing.
    LanguageEnglish
    Pages376-390
    JournalJOURNAL OF SEDIMENTARY RESEARCH
    Volume66
    Issue number2, Par
    DOIs
    Publication statusPublished - Mar 1996

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    meltwater
    sea level
    Pleistocene
    sand wave
    coast
    stratigraphy
    shore platform
    ice
    Last Glacial
    sand and gravel
    lithofacies
    continental shelf
    gravel
    mud
    beach
    weathering
    oscillation
    sedimentation
    trend
    sediment

    Cite this

    McCabe, AM ; OCofaigh, C. / Upper pleistocene facies sequences and relative sea-level trends along the south coast of Ireland. 1996 ; Vol. 66, No. 2, Par. pp. 376-390.
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    Upper pleistocene facies sequences and relative sea-level trends along the south coast of Ireland. / McCabe, AM; OCofaigh, C.

    Vol. 66, No. 2, Par, 03.1996, p. 376-390.

    Research output: Contribution to journalArticle

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