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    Radiocarbon and Thermoluminescence Studies of the Karst Pipe Systems in Southwest England and South Wales

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    Author
    Pazdur, Mieczysław F.
    Bluszcz, Andrzej
    Pazdur, Anna
    Morawiecka, Iwona
    Issue Date
    1995-01-01
    Keywords
    cement
    Devensian
    raised beaches
    South West England
    southern Wales
    Wales
    shore features
    thermoluminescence
    solution features
    karst
    England
    Great Britain
    United Kingdom
    Pleistocene
    upper Pleistocene
    Europe
    Western Europe
    Cenozoic
    Quaternary
    C 14
    carbon
    dates
    isotopes
    radioactive isotopes
    absolute age
    carbonates
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    Citation
    Pazdur, M. F., Bluszcz, A., Pazdur, A., & Morawiecka, I. (1995). Radiocarbon and thermoluminescence studies of the karst pipe systems in southwest England and South Wales. Radiocarbon, 37(2), 111-117.
    Publisher
    Department of Geosciences, The University of Arizona
    Journal
    Radiocarbon
    URI
    http://hdl.handle.net/10150/653378
    DOI
    10.1017/S003382220003054X
    Additional Links
    http://radiocarbon.webhost.uits.arizona.edu/
    Abstract
    Paleokarst forms in raised beach deposits of Southwest England and South Wales and generally known as "pipes" were dated by 14C and thermoluminescence (TL) methods. Current geological opinion is that these pipes are features that developed under the cover of periglacial-solifluctional deposits due to periglacial conditions prevalent in the Late Devensian. In the present study, TL was used to determine the age of quartz grains forming the raised beaches. 14C ages were obtained from carbonate cements within sandrock and on the pipe walls. TL ages measured for quartz grains separated from sandrock samples are older than 80 ka BP, whereas the corresponding TL dates obtained from the sandy material of pipe infills center around 40 ka BP. All carbonates yielded finite apparent 14C dates that range from ca. 45 ka BP to 27 ka BP for sandrock. The apparent 14C dates obtained on carbonate cements from the pipe walls fall into two groups, one ranging from 30 ka BP to 22 ka BP and the other from 15 ka BP to 7 ka BP. On the basis of geochemical considerations, we conclude that the sandrock cements formed between 35 and 25 ka BP and pipe walls cemented between 30 and 2 ka BP with a break during the climate deterioration caused by last ice sheet advance.
    Type
    Article
    text
    Language
    en
    ISSN
    0033-8222
    ae974a485f413a2113503eed53cd6c53
    10.1017/S003382220003054X
    Scopus Count
    Collections
    Radiocarbon, Volume 37, Number 2 (1995)

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