The BGS Lexicon of Named Rock Units — Result Details

Arthur's Seat Volcanic Formation

Computer Code: ASV Preferred Map Code: ASV
Status Code: Full
Age range: Chadian Substage (CI) — Arundian Substage (CJ)
Lithological Description: The predominant rock types are basaltic lavas and tuffs and mugearite lavas; subordinate interbedded sedimentary rocks also occur.
Definition of Lower Boundary: Base of volcanic rocks on sedimentary rocks of Inverclyde Group (Ballagan Formation).
Definition of Upper Boundary: Top of volcanic rocks below sedimentary rocks of Gullane Formation.
Thickness: c.300m
Geographical Limits: Mainly conjectural; thins in all directions.
Parent Unit: Strathclyde Group (SYG)
Previous Name(s): Arthur's Seat Volcanic Rocks (-3180)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Natural exposures in Holyrood Park. 
Reference(s):
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. 
Mitchell, G H. 1962. The geology of the neighbourhood of Edinburgh. (Explanation of Sheet 32) Third Edition. (Reprinted 1980). Memoir of the Geological Survey of Great Britain (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S032 S032 S032