Dumdruff Hill Lava Member

From MediaWiki
Jump to navigation Jump to search

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

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

Name

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

Lithology

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

Stratotype

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

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

Between 45 and 70 m.

Distribution and regional correlation

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

Age

Mid Visean (Arundian to Asbian).

References

  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)