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<p><span dir="auto"><span class="autocomment">Mugdock Lava Member (MGLA), Kilpatrick Hills</span></span></p> <p><b>New page</b></p><div>== Mugdock Lava Member [http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=MGLA (MGLA)], Kilpatrick Hills, Carboniferous, Midland Valley of Scotland ==<br /> <br /> The Mugdock Lava Member is part of the [[Clyde Plateau Volcanic Formation]].<br /> <br /> === Name ===<br /> Previously named the Mugdock Lavas (Hall et al., 1998)&lt;ref name=&quot;hall98&quot;&gt;Hall, I H S, Browne, M A E, and Forsyth, I H. 1998. Geology of the Glasgow district. &#039;&#039;Memoir of the British Geological Survey&#039;&#039;, Sheet 30E (Scotland)&lt;/ref&gt;.<br /> <br /> === Lithology ===<br /> Predominantly plagioclase-macrophyric basalts (‘Markle’ type). Near Devil’s Craig Dam (NS 560 782) a few lavas have abundant feldspar phenocrysts of about 5 mm and some up to 2 cm in length. Near Craigend Castle (NS 548 777) a thin olivine-clinopyroxene-macrophyric basalt (‘Craiglockhart’ type) occurs and in the western part of the Kilpatrick Hills, mugearite lavas are present.<br /> <br /> === Stratotype ===<br /> The Mugdock Lava Member is well exposed in its type area between Mugdock Loch (NS 554 773) and Devil’s Craig Dam (NS 560 782).<br /> <br /> === Lower and upper boundaries ===<br /> The Mugdock Lava Member overlies the more-mafic olivine-microphyric basalts (‘Dalmeny’ type), olivine-clinopyroxene-plagioclase-macrophyric basalts (‘Dunsapie’ type) and olivine-clinopyroxene-macrophyric basalts (‘Craiglockhart’ type) of the underlying [[Cochno Lava Member]].<br /> <br /> The Mugdock Lava Member is overlain by the olivine-microphyric basalts (‘Dalmeny’ type) of the [[Tambowie Lava Member]] in the south of the Kilpatrick Hills. To the north, the [[Tambowie Lava Member]] is absent and the Mugdock Lava Member is directly overlain by the sedimentary rocks of the [[Lawmuir Formation]] ([[Strathclyde Group]]).<br /> <br /> === Thickness ===<br /> About 200 m thick in the north-east Kilpatrick Hills, thinning to about 100 m in the south-west of that area.<br /> <br /> === Distribution and regional correlation ===<br /> Kilpatrick Hills: The Mugdock Lava Member is present in the south of the area, between Old Kilpatrick (NS 465 730), where it is continuous with the upper part of the [[Strathgryfe Lava Member]] of the Renfrewshire Hills lava block south of the River Clyde, and the area around Mugdock (NS 56 77). The lavas might have been derived from the Waterhead Volcano-complex in the Campsie Fells lava block.<br /> <br /> === Age ===<br /> Mid Visean (Arundian to Asbian).<br /> <br /> == References ==<br /> &lt;references/&gt;<br /> [[Category:Carboniferous lithostratigraphical nomenclature]]</div>

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