https://earthwise.bgs.ac.uk/index.php?title=Mugdock_Lava_Member&feed=atom&action=historyMugdock Lava Member - Revision history2024-03-29T07:11:18ZRevision history for this page on the wikiMediaWiki 1.41.0https://earthwise.bgs.ac.uk/index.php?title=Mugdock_Lava_Member&diff=52615&oldid=prevDbk: 1 revision imported2021-07-26T14:53:52Z<p>1 revision imported</p>
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</td></tr></table>Dbkhttps://earthwise.bgs.ac.uk/index.php?title=Mugdock_Lava_Member&diff=52614&oldid=prevGeosource>Volunteer 01: /* Mugdock Lava Member (MGLA), Kilpatrick Hills */2015-10-27T11:07:28Z<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 [https://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=MGLA (MGLA)], Kilpatrick Hills, Carboniferous, Midland Valley of Scotland ==<br />
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The Mugdock Lava Member is part of the [[Clyde Plateau Volcanic Formation]].<br />
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=== Name ===<br />
Previously named the Mugdock Lavas (Hall et al., 1998)<ref name="hall98">Hall, I H S, Browne, M A E, and Forsyth, I H. 1998. Geology of the Glasgow district. ''Memoir of the British Geological Survey'', Sheet 30E (Scotland)</ref>.<br />
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=== 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 />
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=== 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 />
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=== 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 />
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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 />
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=== 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 />
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=== 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 />
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=== Age ===<br />
Mid Visean (Arundian to Asbian).<br />
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== References ==<br />
<references/><br />
[[Category:Carboniferous lithostratigraphical nomenclature]]</div>Geosource>Volunteer 01