Dumdruff Hill Lava Member

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Dumdruff Hill Lava Member (DHLA), Dunlop-Eaglesham Block, Carboniferous, Midland Valley of Scotland[edit]

The Dumdruff Hill Lava Member is part of the Clyde Plateau Volcanic Formation.

Name[edit]

Previously named the Dumdruff Hill lavas. See MacPherson and Phillips (1997)[1]; Phillips and MacPherson (1996)[2]; MacPherson et al. (2000)[3].

Lithology[edit]

The Dumdruff Hill Lava Member consists of trachyandesite and trachytic lava.

Stratotype[edit]

The type area is the Dunlop–Eaglesham moors between Glasgow, Kilmarnock and Hamilton, around Ballageich (NS 5200 5200) and Braidley Moss (NS 6100 4100) south of Dumdruff Hill.

Lower and upper boundaries[edit]

The base is unconformable on the Eaglesham Lava Member that consists of basaltic lavas.

The member is overlain in part by the Gowk Stane Volcaniclastic Member and the Harelaw Lava Member, with which it is partly interbedded. The Upper Flow Moss Lava Member also rests on this member locally.

Thickness[edit]

Between 45 and 70 m.

Distribution and regional correlation[edit]

Dunlop–Eaglesham moors between Glasgow, Kilmarnock and Hamilton around Ballageich (NS 5200 5200) and Braidley Moss (NS 6100 4100) south of Dumdruff Hill.

Age[edit]

Mid Visean (Arundian to Asbian).

References[edit]

  1. MacPherson, K A T, and Phillips, E R. 1997. The geology of the Clyde Plateau Volcanic Formation of the Kilmarnock district (Sheet 22E), central Scotland. British Geological Survey Technical Report, WA/97/88
  2. Phillips, E R, and Macpherson, K A T. 1996. Petrology, geochemistry and classification of the Clyde Plateau Volcanic Formation, Kilmarnock district (Sheet 22), Midland Valley, Scotland. British Geological Survey Technical Report, WG/96/24
  3. MacPherson, K A T, Smith, R A, and Akhurst, M C. 2000. Geology of the Kilmarnock district. Sheet description of the British Geological Survey, Sheet 22E (Scotland)