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Stronend Volcaniclastic Member (STRV), Carboniferous, Midland Valley of Scotland

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==Stronend Volcaniclastic Member [http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=STRV (STRV)], Fintry-Touch Block, Carboniferous, Midland Valley of Scotland ==
Stronend Volcaniclastic Member is part of the [[Clyde Plateau Volcanic Formation]].
=== Name ===
Previously known as the Stronend Interbasaltic Beds (see Francis et al., 1970)<ref name="Francis70">Francis, E H, Forsyth, I H, Read, W A, and Armstrong, M. 1970. The geology of the Stirling district.''Memoir of the Geological Survey of Great Britain'', Sheet 39 (Scotland)</ref>.

=== Lithology ===
The Stronend Volcaniclastic Member consists predominantly of volcaniclastic sedimentary rocks and possible tuff, with weathered basalt lava (including bole). It weathers back to form a prominent shelf in the escarpment on the western side of the Fintry Hills.

=== Stratotype ===
The type area is in the western Fintry Hills, north-east of Glasgow (NS 6322 8808 to NS 6274 8953) (Francis et al., 1970)<ref name="Francis70"></ref>. A reference section is 0.5 km south of Stronend summit, western Fintry Hills (NS 6288 8885) (Francis et al., 1970)<ref name="Francis70"></ref>. Here more than 1.5 m of bole lying near the base of the member is exposed.

=== Lower and upper boundaries ===
Weathered basalt (bole) at the base of the member is conformable or disconformable on plagioclase-microphyric basalt lava of the [[Spout of Ballochleam Lava Member]] within which the Stronend Volcaniclastic Member is interdigitated.

Volcaniclastic rocks of the Stronend Volcaniclastic Member are overlain by plagioclase-microphyric basalt lava of the [[Spout of Ballochleam Lava Member]], within which the Stronend Volcaniclastic Member is interdigitated.

=== Thickness ===
Uncertain. Francis et al. (1970)<ref name="Francis70"></ref> stated that the member seems to be relatively thin and local. At Stronend summit (NS 6288 8885) more than 1.5 m of bole is exposed, lying near the base of the member. In a tributary of Cammal Burn (NS 6399 8764) more than 2.7 m of bole crops out, probably at the top of the member.

=== Distribution and regional correlation ===
The member is restricted to the Fintry–Touch Block (Francis et al., 1970)<ref name="Francis70"></ref> and specifically to the western Fintry Hills, north-east of Glasgow. These rocks crop out out in a restricted area from the western side of Stronend (NS 6274 8953) to the south-south-east, to north of Double Craig (NS 6322 8808).

=== Age ===
Mid Visean (Arundian to Asbian).

== References ==
<references/>
[[Category:Carboniferous lithostratigraphical nomenclature]]

Stronend Volcaniclastic Member - Revision history

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Geosource>Volunteer 01: /* Stronend Volcaniclastic Member (STRV), Carboniferous, Midland Valley of Scotland */