The BGS Lexicon of Named Rock Units — Result Details

Garleton Hills Volcanic Formation

Computer Code: GHV Preferred Map Code: GHV
Status Code: Full
Age range: Visean Stage (CV) — Visean Stage (CV)
Lithological Description: Basaltic and trachytic lavas and tuffs predominate; but subordinate volcanic-derived sedimentary rocks also occur.
Definition of Lower Boundary: Base of volcanic rocks resting on sedimentary rocks of Inverclyde Group (Ballagan Formation).
Definition of Upper Boundary: Top of volcanic rocks below sedimentary rocks of Gullane Formation.
Thickness: 380m in Garleton Hills (240m at North Berwick; 257m in Spilmersford Borehole).
Geographical Limits: Little known; thins in all directions.
Parent Unit: Strathclyde Group (SYG)
Previous Name(s): Garleton Hills Volcanic Rocks (-930)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Garleton Hills. 
Reference(s):
McAdam, A D and Tulloch, W, 1985. Geology of the Haddington district. Memoir of the Geological Survey, sheet 33W (Scotland). 
Chisholm, J I, MacAdam, A D, Brand, P J. 1989. Lithostratigraphical classification of Upper Devonian and Lower Carboniferous rocks in the Lothians. British Geological Survey Technical Report, WA/89/26. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S033 S033 S041