Abstract:Synopsis
The Green Beds are distinctive chlorite- and epidote-rich metasedimentary rocks, which collectively represent a series of important lithostratigraphical marker units in the Southern Highland Group of the dominantly late Precambrian Dalradian Supergroup of Scotland. In a recent re-evaluation of the nature and origin of the Green Beds, integrated mapping, sedimentological, petrological and geochemical studies have been carried out. The Green Beds form relatively thin but laterally extensive un… Show more
“…For reasons of analytical consistency, only the new data are used, with the following exceptions; analyses from the Dalradian sequences of Northern Ireland are from Hyslop & Pickett (2001) and those from the Blackwater Formation are from Macdonald et al (2005). The data set also includes the analyses of four rocks from the Loch Avich Lavas and Tayvallich formations published by Pickett et al (2006) and previously unpublished BGS data for two Loch Avich and two Ben Vrackie samples. The total number of analyses presented in this study is 113.…”
Section: Sampling Strategy and Analytical Methodsmentioning
confidence: 99%
“…Lavas and associated sills are confined to Argyll, although the extensive development of volcaniclastic beds ('green beds') throughout the Southern Highlands of Scotland and the north of Ireland indicates more widespread volcanic activity (Pickett et al 2006). …”
“…For reasons of analytical consistency, only the new data are used, with the following exceptions; analyses from the Dalradian sequences of Northern Ireland are from Hyslop & Pickett (2001) and those from the Blackwater Formation are from Macdonald et al (2005). The data set also includes the analyses of four rocks from the Loch Avich Lavas and Tayvallich formations published by Pickett et al (2006) and previously unpublished BGS data for two Loch Avich and two Ben Vrackie samples. The total number of analyses presented in this study is 113.…”
Section: Sampling Strategy and Analytical Methodsmentioning
confidence: 99%
“…Lavas and associated sills are confined to Argyll, although the extensive development of volcaniclastic beds ('green beds') throughout the Southern Highlands of Scotland and the north of Ireland indicates more widespread volcanic activity (Pickett et al 2006). …”
“…The Southern Highland Group in the Highland Border region consists of a thick sequence of turbidite-facies rocks (now metagreywackes) with interdigitations of slaty pelite, and uncommon chloriteepidote-rich beds known as 'green beds', whose detrital volcaniclastic origin is discussed in detail in the Bealach nam Bo GCR site report (see also Pickett et al, 2006).…”
“…Submarine fans prograde from the margin into the trough and may extend along the trough axis, spilling out onto adjacent marginal platforms. Deltaic volcanoclastic debris is reworked along the margin as 'greenbeds' in the Southern Highland Group (Pickett et al, 2006). The extensional geometry of the various components of this architecture must of necessity be speculative, possible cross-section configurations are incorporated in the model of Figure 9.…”
Section: Cycle II -Renewed Rifting To Rift-drift Transition In the Edmentioning
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