Record details

Title
    At what stratigraphical level is the mid Ludfordian (Ludlow, Silurian) positive carbon isotope excursion in the type Ludlow area, Shropshire, England?
Author
    Frýda, Jiří
    Loydel, D.
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Bulletin of Geosciences
Vol./nr.
    Roč. 86, č. 2
Pages
    12
Year
    2011
Thesaurus term
    Silurian, LAU, Barrandian
Keyword
    Area
    Carbon
    England
    Excursion
    Isotope
    Level
    Ludfordian
    Ludlow
    Mid
    Positive
    Shropshire
    Silurian
    Stratigraphical
    Type
Abstract (in english)
   The balance of evidence suggests that the mid Ludfordian positive carbon isotope excursion (CIE) commences in the Ludlow area, England in the uppermost Upper Whitcliffe Formation, with the excursion continuing into at least the Platyschisma Shale Member of the overlying Downton Castle Sandstone Formation. The Ludlow Bone Bed Member, at the base of the DCS Formation has previously been considered to be of Přídolí age. Conodont and thelodont evidence, however, are consistent with the mid Ludfordian age proposed here. New ?13Corg data are presented from Weir Quarry, W of Ludlow, showing a pronounced positive excursion commencing in the uppermost Upper Whitcliffe Formation, in strata with a palynologically very strong marine influence. Elsewhere in the world, the mid Ludfordian CIE is associated with major facies changes indicated shallowing; the lithofacies evidence from the Ludlow area is consistent with this. There appears not to be a major stratigraphical break at the base of the Bone
   Bed Member.
Contributor
    Česká geologická služba
Contributor code
    ČGS (RIV)
Source format
    R
Import date
    15. 10. 2014