A. W. A. Rushton, S. G. Molyneux, 2011. "Scotland: Hebridean Terrane", 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
Download citation file:
The Cambrian succession in the Hebridean Terrane extends for about 200 km from near Durness on the northern coast of the Scottish mainland SSW to Skye (Fig. 14). The classic account of the whole region is the memoir by Peach et al. (1907), which work had a great influence on British geological studies in the Lower Palaeozoic during the earlier part of the 20th century. The geology of the region was described by Park et al. (2002) and some critical localities were reviewed by Prigmore & Rushton (1999). Sedimentological studies by Swett and his collaborators (Swett 1969; Swett & Smit 1972) and by McKie (1990a-c, 1993) and new litho-and biostratigraphical work, including the study of microfossil faunas and floras, have led to a re-appraisal of the stratigraphical succession and its correlation.
The Cambrian succession (Fig. 15, Column 22) consists of a generally upward-fining sequence of clastic deposits, the Ardvreck Group of early Cambrian age, followed by a succession of carbonate formations, the Durness Group, of Cambrian to early Ordovician age. The strata were deposited on a stable, gently sloping shelf, and because the facies represented are generally similar throughout the length of the outcrop, it is inferred that the trend of the shelf lay approximately parallel to the line of the present outcrop (Bluck 2007).
Figures & Tables
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