Saughen Braes Lava Member

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Saughen Braes Lava Member (SBLA), Kilpatrick Hills, Carboniferous, Midland Valley of Scotland[edit]

The Saughen Braes Lava Member is part of the Clyde Plateau Volcanic Formation.

Name[edit]

Previously named the Saughen Braes Lavas (Hall et al., 1998)[1].

Lithology[edit]

Plagioclase-macrophyric basalts (‘Markle’ type).

Stratotype[edit]

The unit crops out in its type area on Saughen Braes (NS 462 783), where it consists of about five flows.

Lower and upper boundaries[edit]

The Saughen Braes Lava Member interdigitates with the Auchineden Lava Member and in places underlies it, for example around Black Linn Reservoir (NS 443 772). To the west of Lang Craigs (NS 430 760) the sequence is only represented by the Auchineden Lava Member. Where the Saughen Braes Lava Member is fully developed to the north-east of the area, it is underlain by the Burncrooks Volcaniclastic Member. The Saughen Braes Lava Member interdigitates with and is overlain by the Auchineden Lava Member.

Thickness[edit]

Between 0 and 40 m.

Distribution and regional correlation[edit]

Kilpatrick Hills: the unit occurs on Saughen Braes (NS 462 783), thinning out to the south near Fynloch (NS 458 770).

Age[edit]

Mid Visean (Arundian to Asbian).

References[edit]

  1. 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)

References[edit]