M. Williams, 2011. "Carbon isotope stratigraphy", A Revised Correlation of the Cambrian Rocks in the British Isles, A. W. A. Rushton, P. M. Brück, S. G. Molyneux, M. Williams, N. H. Woodcock
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Carbon isotope excursions (CIEs) from the latest Proterozoic and Cambrian have been linked with major global biotic/oceanographic events (e.g. Salzmann et al. 2004) and are viewed as important for Cambrian correlation. Zhu et al. (2006) provide a synthesis of the chronology, chronostratigraphy and carbon isotope stratigraphy for the Cambrian, identifying and naming ten CIEs.
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A Revised Correlation of the Cambrian Rocks in the British Isles
This work reviews the correlation of the British and Irish Cambrian with the current (though incomplete) international standard for the Cambrian. Since the earlier edition of 1972, the basal and upper limits of the Cambrian system has been internationally agreed; so this account excludes Tremadocian rocks but includes some that were formerly considered Neoproerozoic. Half of the series and stage subdivisions are internationally agreed, but for the undefined divisions of the Cambrian the standard used here makes use of data from Avalonian successions.
Since the first edition was published, almost every aspect of the Cambrian I the British Isles has been subjected to new study. Here, the plate tectonic make-up of the British Isles is reviewed, new radiometric ages and isotopic studies are summarized and the biostratigraphy is enhanced by the study of acritarchs, especially in the Irish successions