Abstract
Synopsis: The Camas Malag Formation, comprising interbedded rhythmites and orthoconglomerates, and lying unconformably on a very irregular surface of carbonate rocks of the Lower Palaeozoic Durness Group, is interpreted as a lacustrine deposit of Triassic age. Boudins in adjacent Durness carbonates of rhythmite lithologies identical to those of the Formation are regarded as deformed fragments of tabular extensions of the latter deposited in cavities parallel to the bedding of the Durness rocks of the lake floor. They provide a minimum age for a deformation phase, earlier than the contact metamorphism produced by the Beinn an Dubhaich granite, in which dolerite sheets intrusive into Durness rocks also were deformed.

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