Radiocarbon constraints on the history of the western Irish ice sheet prior to the Last Glacial Maximum

A Marshall McCabe, Peter U. Clark, Jorie Clark

    Research output: Contribution to journalArticle

    33 Citations (Scopus)

    Abstract

    Accelerator mass spectrometer C-14 dating of in situ monospecific marine microfaunas and reworked shells records high relative sea level on the western coast of Ireland between ca.40 and 19 call (calibrated) ka, requiring substantial isostatic loading by the Irish ice sheet (IIS) during that interval. Glacial and marine deposits also record a rapid fluctuation of the US margin onto the continental shelf ca.28 cal ka. Evidence that the coast was not subsequently overridden by the IIS indicates that at least for this sector of the ice sheet, the ice margin during the Last Glacial Maximum (LGM) was less extensive than the 28 cal ka event. Our data from western Ireland support C-14 and Cl-36 chronologies from the Irish Sea Basin in identifying an US that was as extensive and thick as the LGM IIS for much of the 20 k.y. interval prior to the LGM.
    LanguageEnglish
    Pages147-150
    JournalGeology
    Volume35
    Issue number2
    DOIs
    Publication statusPublished - Feb 2007

    Fingerprint

    Last Glacial Maximum
    ice sheet
    history
    ice margin
    coast
    chronology
    continental shelf
    spectrometer
    sea level
    shell
    basin

    Cite this

    McCabe, A Marshall ; Clark, Peter U. ; Clark, Jorie. / Radiocarbon constraints on the history of the western Irish ice sheet prior to the Last Glacial Maximum. In: Geology. 2007 ; Vol. 35, No. 2. pp. 147-150.
    @article{fa84fd2fe4ee46e5be639188d8a17d1b,
    title = "Radiocarbon constraints on the history of the western Irish ice sheet prior to the Last Glacial Maximum",
    abstract = "Accelerator mass spectrometer C-14 dating of in situ monospecific marine microfaunas and reworked shells records high relative sea level on the western coast of Ireland between ca.40 and 19 call (calibrated) ka, requiring substantial isostatic loading by the Irish ice sheet (IIS) during that interval. Glacial and marine deposits also record a rapid fluctuation of the US margin onto the continental shelf ca.28 cal ka. Evidence that the coast was not subsequently overridden by the IIS indicates that at least for this sector of the ice sheet, the ice margin during the Last Glacial Maximum (LGM) was less extensive than the 28 cal ka event. Our data from western Ireland support C-14 and Cl-36 chronologies from the Irish Sea Basin in identifying an US that was as extensive and thick as the LGM IIS for much of the 20 k.y. interval prior to the LGM.",
    author = "McCabe, {A Marshall} and Clark, {Peter U.} and Jorie Clark",
    year = "2007",
    month = "2",
    doi = "10.1130/G23167A.1",
    language = "English",
    volume = "35",
    pages = "147--150",
    journal = "Geology",
    issn = "0091-7613",
    number = "2",

    }

    Radiocarbon constraints on the history of the western Irish ice sheet prior to the Last Glacial Maximum. / McCabe, A Marshall; Clark, Peter U.; Clark, Jorie.

    In: Geology, Vol. 35, No. 2, 02.2007, p. 147-150.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Radiocarbon constraints on the history of the western Irish ice sheet prior to the Last Glacial Maximum

    AU - McCabe, A Marshall

    AU - Clark, Peter U.

    AU - Clark, Jorie

    PY - 2007/2

    Y1 - 2007/2

    N2 - Accelerator mass spectrometer C-14 dating of in situ monospecific marine microfaunas and reworked shells records high relative sea level on the western coast of Ireland between ca.40 and 19 call (calibrated) ka, requiring substantial isostatic loading by the Irish ice sheet (IIS) during that interval. Glacial and marine deposits also record a rapid fluctuation of the US margin onto the continental shelf ca.28 cal ka. Evidence that the coast was not subsequently overridden by the IIS indicates that at least for this sector of the ice sheet, the ice margin during the Last Glacial Maximum (LGM) was less extensive than the 28 cal ka event. Our data from western Ireland support C-14 and Cl-36 chronologies from the Irish Sea Basin in identifying an US that was as extensive and thick as the LGM IIS for much of the 20 k.y. interval prior to the LGM.

    AB - Accelerator mass spectrometer C-14 dating of in situ monospecific marine microfaunas and reworked shells records high relative sea level on the western coast of Ireland between ca.40 and 19 call (calibrated) ka, requiring substantial isostatic loading by the Irish ice sheet (IIS) during that interval. Glacial and marine deposits also record a rapid fluctuation of the US margin onto the continental shelf ca.28 cal ka. Evidence that the coast was not subsequently overridden by the IIS indicates that at least for this sector of the ice sheet, the ice margin during the Last Glacial Maximum (LGM) was less extensive than the 28 cal ka event. Our data from western Ireland support C-14 and Cl-36 chronologies from the Irish Sea Basin in identifying an US that was as extensive and thick as the LGM IIS for much of the 20 k.y. interval prior to the LGM.

    U2 - 10.1130/G23167A.1

    DO - 10.1130/G23167A.1

    M3 - Article

    VL - 35

    SP - 147

    EP - 150

    JO - Geology

    T2 - Geology

    JF - Geology

    SN - 0091-7613

    IS - 2

    ER -