Abstract
The orthotectonic zone of the British Caledonides lies on the northern margin of the orogen and consists of a varied sequence of late Middle Proterozoic to Cambrian metasediments and meta-igneous rocks resting wholly on continental crust. In Scotland the zone is bordered by the Highland Boundary fault to the SE and by the Moine Thrust zone, which forms the Caledonian front, to the NW. To the SE of the Highland Boundary fault, in the Midland Valley, lies a thick sequence of dominantly Devonian and Carboniferous sediments and associated intrusives while to the NW of the Moine Thrust zone are late-Archaean to Middle Proterozoic Lewisian gneisses and granulites, which are overlain by clastic and carbonate sequences of varying age from late Middle Proterozoic to Lower Ordovician age.
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Fettes, D.J., Harris, A.L., Hall, L.M. (1986). The Caledonian Geology of the Scottish Highlands. In: Fettes, D.J., Harris, A.L. (eds) Synthesis of the Caledonian Rocks of Britain. NATO ASI Series, vol 175. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4654-5_11
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