https://earthwise.bgs.ac.uk/index.php?title=Carbeth_Lava_Member&feed=atom&action=historyCarbeth Lava Member - Revision history2024-03-29T06:40:07ZRevision history for this page on the wikiMediaWiki 1.41.0https://earthwise.bgs.ac.uk/index.php?title=Carbeth_Lava_Member&diff=52513&oldid=prevDbk: 1 revision imported2021-07-26T14:53:49Z<p>1 revision imported</p>
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</td></tr></table>Dbkhttps://earthwise.bgs.ac.uk/index.php?title=Carbeth_Lava_Member&diff=52512&oldid=prevGeosource>Volunteer 01: /* Carbeth Lava Member (CBTL), Kilpatrick Hills, Carboniferous, Midland Valley of Scotland */2015-10-20T10:52:18Z<p><span dir="auto"><span class="autocomment">Carbeth Lava Member (CBTL), Kilpatrick Hills, Carboniferous, Midland Valley of Scotland</span></span></p>
<p><b>New page</b></p><div>== Carbeth Lava Member [https://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=CBTL (CBTL)], Kilpatrick Hills, Carboniferous, Midland Valley of Scotland ==<br />
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The Carbeth Lava Member is part of the [[Clyde Plateau Volcanic Formation]].<br />
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=== Name ===<br />
Previously named the Carbeth 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 />
Mainly plagioclase-macrophyric basalt (‘Markle’ type). There are also some plagioclase-microphyric basalts (‘Jedburgh’ type) and olivine-clinopyroxene-plagioclase-macrophyric basalts (‘Dunsapie’ type), as well as some mugearites near the base.<br />
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=== Stratotype ===<br />
The lavas are well exposed in the type area around Carbeth (NS 527 796) and in the scarps around the Birny Hills (NS 495 770) (see Hall et al., 1998)<ref name="hall98"/>. A reference section was encountered in the Loch Humphrey Borehole (BGS Registration Number NS47NE/1) (NS 4582 7555) beneath the [[Greenside Volcaniclastic Member]] and above the [[Auchineden Lava Member]]. In the borehole, it is 20 m thick and consists of ‘Markle’ type lavas with some ‘Jedburgh’ type and some thin beds of tuff. A geological log is available.<br />
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=== Lower and upper boundaries ===<br />
The Carbeth Lava Member overlies the plagioclase-microphyric basalts (‘Jedburgh’ type) of the [[Auchineden Lava Member]].<br />
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The member is unconformably overlain by the [[Greenside Volcaniclastic Member]]. West of Loch Humphrey (NS 455 760) the member is reduced to one lava flow, which is preserved only in isolated patches below the volcaniclastic sedimentary rocks of the [[Greenside Volcaniclastic Member]].<br />
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=== Thickness ===<br />
Between 0 and 150 m. From the central part of the Kilpatrick Hills the member thins out towards the SW, partly due to erosion. It is some 80 m thick in the north-east of the region (Hall et al., 1998<ref name="hall98"/>, table 5).<br />
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=== Distribution and regional correlation ===<br />
The Carbeth Lava Member is geographically widespread in the Kilpatrick Hills, stretching from Strath Blane (NS 560 790) in the north-east to Brown Hill (NS 445 764) in the south-west. The member is well exposed around Carbeth and in the Birny Hills (see above).<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]]<br />
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== References ==<br />
<references/><br />
[[Category:Carboniferous lithostratigraphical nomenclature]]</div>Geosource>Volunteer 01