Sedimentology of a late Pleistocene submarine-moraine complex, County Down, Northern Ireland

AM MCCABE, GF DARDIS, PM HANVEY

    Research output: Contribution to journalArticle

    65 Citations (Scopus)

    Abstract

    The Killard Point moraine formed when Late Pleistocene ice grounded on the isostatically depressed coastal lowlands of County Down, Northern Ireland, at a time of relatively high sea level. The moraine consists of three major lithologic associations which prograded for about 1 km from the ice-grounding zone into a glaciomarine environment. At the base of the succession a diamicton association is characterized by massive and stratified diamictons that are mainly debris flows. It contains a minor ice-rafted debris component. The overlying sand association was deposited from sediment-gravity flows of low to intermediate viscosity. The gravel association was deposited by high-density sediment-gravity flows. Massive mud beds or drapes occur throughout the sequence and are related to low-density turbidity or contour currents. Sequences of this type are more common in the geological record than the literature suggests and are often explained in terms of terrestrial-based deglacial models. This calls for a sedimentological reappraisal of many "glacigenic" deposits which accumulated in areas subject to deep isostatic depression during the Late Pleistocene.
    LanguageEnglish
    Pages716-730
    JournalJournal of Sedimentary Petrology
    Volume54
    Issue number3
    DOIs
    Publication statusPublished - 1984

    Fingerprint

    diamicton
    gravity flow
    moraine
    sedimentology
    Pleistocene
    ice
    ice-rafted debris
    geological record
    debris flow
    sediment
    turbidity
    gravel
    mud
    viscosity
    sea level
    sand

    Cite this

    MCCABE, AM ; DARDIS, GF ; HANVEY, PM. / Sedimentology of a late Pleistocene submarine-moraine complex, County Down, Northern Ireland. In: Journal of Sedimentary Petrology. 1984 ; Vol. 54, No. 3. pp. 716-730.
    @article{4ed9fc95b2224a078e0093cbfa1c193f,
    title = "Sedimentology of a late Pleistocene submarine-moraine complex, County Down, Northern Ireland",
    abstract = "The Killard Point moraine formed when Late Pleistocene ice grounded on the isostatically depressed coastal lowlands of County Down, Northern Ireland, at a time of relatively high sea level. The moraine consists of three major lithologic associations which prograded for about 1 km from the ice-grounding zone into a glaciomarine environment. At the base of the succession a diamicton association is characterized by massive and stratified diamictons that are mainly debris flows. It contains a minor ice-rafted debris component. The overlying sand association was deposited from sediment-gravity flows of low to intermediate viscosity. The gravel association was deposited by high-density sediment-gravity flows. Massive mud beds or drapes occur throughout the sequence and are related to low-density turbidity or contour currents. Sequences of this type are more common in the geological record than the literature suggests and are often explained in terms of terrestrial-based deglacial models. This calls for a sedimentological reappraisal of many {"}glacigenic{"} deposits which accumulated in areas subject to deep isostatic depression during the Late Pleistocene.",
    author = "AM MCCABE and GF DARDIS and PM HANVEY",
    year = "1984",
    doi = "10.1306/212F84E0-2B24-11D7-8648000102C1865D",
    language = "English",
    volume = "54",
    pages = "716--730",
    journal = "Journal of Sedimentary Petrology",
    issn = "0022-4472",
    number = "3",

    }

    Sedimentology of a late Pleistocene submarine-moraine complex, County Down, Northern Ireland. / MCCABE, AM; DARDIS, GF; HANVEY, PM.

    In: Journal of Sedimentary Petrology, Vol. 54, No. 3, 1984, p. 716-730.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Sedimentology of a late Pleistocene submarine-moraine complex, County Down, Northern Ireland

    AU - MCCABE, AM

    AU - DARDIS, GF

    AU - HANVEY, PM

    PY - 1984

    Y1 - 1984

    N2 - The Killard Point moraine formed when Late Pleistocene ice grounded on the isostatically depressed coastal lowlands of County Down, Northern Ireland, at a time of relatively high sea level. The moraine consists of three major lithologic associations which prograded for about 1 km from the ice-grounding zone into a glaciomarine environment. At the base of the succession a diamicton association is characterized by massive and stratified diamictons that are mainly debris flows. It contains a minor ice-rafted debris component. The overlying sand association was deposited from sediment-gravity flows of low to intermediate viscosity. The gravel association was deposited by high-density sediment-gravity flows. Massive mud beds or drapes occur throughout the sequence and are related to low-density turbidity or contour currents. Sequences of this type are more common in the geological record than the literature suggests and are often explained in terms of terrestrial-based deglacial models. This calls for a sedimentological reappraisal of many "glacigenic" deposits which accumulated in areas subject to deep isostatic depression during the Late Pleistocene.

    AB - The Killard Point moraine formed when Late Pleistocene ice grounded on the isostatically depressed coastal lowlands of County Down, Northern Ireland, at a time of relatively high sea level. The moraine consists of three major lithologic associations which prograded for about 1 km from the ice-grounding zone into a glaciomarine environment. At the base of the succession a diamicton association is characterized by massive and stratified diamictons that are mainly debris flows. It contains a minor ice-rafted debris component. The overlying sand association was deposited from sediment-gravity flows of low to intermediate viscosity. The gravel association was deposited by high-density sediment-gravity flows. Massive mud beds or drapes occur throughout the sequence and are related to low-density turbidity or contour currents. Sequences of this type are more common in the geological record than the literature suggests and are often explained in terms of terrestrial-based deglacial models. This calls for a sedimentological reappraisal of many "glacigenic" deposits which accumulated in areas subject to deep isostatic depression during the Late Pleistocene.

    U2 - 10.1306/212F84E0-2B24-11D7-8648000102C1865D

    DO - 10.1306/212F84E0-2B24-11D7-8648000102C1865D

    M3 - Article

    VL - 54

    SP - 716

    EP - 730

    JO - Journal of Sedimentary Petrology

    T2 - Journal of Sedimentary Petrology

    JF - Journal of Sedimentary Petrology

    SN - 0022-4472

    IS - 3

    ER -