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		<updated>2015-07-26T17:20:42Z</updated>

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|description={{|1=Compositional variation of sandstones within the Ordovician Barrhill and Scaur groups, Leadhills Supergroup. The triangular plots illustrate the relative abundance of quartzose grains (Q), feldspathic grains (F) and unstable (labile) lithic or mineral grains (L). The corner points of the triangles correspond to 100 per cent Q, F or L, as indicated. From: Figure 18 in  Stone, P, McMillan, A A, Floyd, J D, Barnes, R P, and Phillips, E R. 2012. British regional geology: South of Scotland (Fourth edition). (Keyworth, Nottingham: British Geological Survey.)}}&lt;br /&gt;
|date=2015-07-26 18:19:36&lt;br /&gt;
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