http://earthwise-staging.bgs.ac.uk/index.php?action=history&feed=atom&title=Wall_Hill_MemberWall Hill Member - Revision history2026-04-17T01:41:52ZRevision history for this page on the wikiMediaWiki 1.42.3http://earthwise-staging.bgs.ac.uk/index.php?title=Wall_Hill_Member&diff=52763&oldid=prevDbk: 1 revision imported2021-07-26T14:53:57Z<p>1 revision imported</p>
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<p><b>New page</b></p><div>==Wall Hill Member [http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=WLH (WLH)], Carboniferous, Midland Valley of Scotland ==<br />
Wall Hill Member is part of the [[Ballagan Formation]]<br />
=== Name ===<br />
Previously named the Wall Hill Sandstone Group by Deegan (1973)<ref name="Deegan73">Deegan, C E.1973.Tectonic control of sedimentation at the margin of a Carboniferous depositional basin in Kirkcud-brightshire.''Scottish Journal of Geology'', Vol. 9, 1–28.</ref>, and the Wall Hill Sandstone Formation by Lintern and Floyd (2000)<ref name="LandF">Lintern, B C, and Floyd, J D.2000.Geology of the Kirkcudbright–Dalbeattie district.''Memoir of the British Geological Survey'', Sheets 5W and 5E, part 6W (Scotland)</ref>. The status is here changed to a member and the ‘Sandstone’ epithet dropped.<br />
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=== Lithology ===<br />
The member comprises fining-upwards cycles of pale grey to white conglomerates and sandstones with thin purple siltstones, ‘marls’ and shales.<br />
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=== Stratotype ===<br />
The type section is the coastal outcrop between White Port Bay (NX 7234 4336) and Port Mary (NX 7550 4540) where the sequence comprises (base upwards) of about 210 m of conglomeratic sandstones, siltstones, ‘marls’ and shales with isolated dolostone nodules; 120 m of sandstones (sometimes conglomeratic), siltstone and shale; and more than 40 m of coarse conglomerates, interbedded with conglomeratic sandstones and a few thin red ‘marls’ (Deegan, 1973<ref name="Deegan73"></ref>; see also Lintern and Floyd, 2000, p. 83–85<ref name="LandF"></ref>).<br />
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=== Lower and upper boundaries ===<br />
The base is unconformable on turbidites of the Silurian Raeberry Castle Formation, Riccarton Group.<br />
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The top of the member is faulted against the coarse conglomeratic red bed facies of the Orroland Member (Figure 10, Column 1).<br />
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=== Thickness ===<br />
About 370 m<br />
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=== Distribution and regional correlation ===<br />
Coastal outcrop between White Port (NX 7234 4336) and Port Mary (NX 7550 4540), south-west Scotland (Solway Firth).<br />
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=== Age ===<br />
Tournaisian.<br />
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== References ==<br />
<references/><br />
[[Category:Carboniferous lithostratigraphical nomenclature]]</div>Geosource>Volunteer 01