The BGS Lexicon of Named Rock Units — Result Details

Eyemouth Volcanic Formation

Computer Code: EYVO Preferred Map Code: EYVO
Status Code: Full
Age range: Early Devonian Epoch (DL) — Early Devonian Epoch (DL)
Lithological Description: Olivine-phyric basaltic lavas, basaltic andesites and andesites with interbeds of tuff and tuffaceous rocks, and rare dacite or rhyodacite.
Definition of Lower Boundary: At White Heugh, south of St Abb's Head, where the lavas overlie the 'Bell Hill sediments' of the Great Conglomerate Formation and north-west of Coldingham, unconformably overlying Silurian strata.
Definition of Upper Boundary: The top of the basaltic to andesitic lavas, below the Auchencrow Burn Sandstone Formation.
Thickness: From 500 to 600 m thick.
Geographical Limits: Between Eyemouth and St Abb's Head.
Parent Unit: Reston Group (REST)
Previous Name(s): Lower Devonian [Lower Old Red Sandstone] Lavas (-3396)
Alternative Name(s): none recorded or not applicable
Partial Type Section  Along the coastline from Pettico Wick to St Abb's Harbour. Stephenson, D. 1999. 
Browne, M A E, Smith, R A and Aitken, A M. 2001. A lithostratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. Version 3. British Geological Survey Research Report RR/01/04. 
Stephenson, D. 1999. Pettico Wick to St Abb's Harbour, 552 - 556 in Caledonian Igneous Rocks of Great Britain. (Geological Conservation Review Series No. 17). Stephenson, D and six others (editors). [Peterborough: Joint Nature Conservation Committee.] 
Greig, D C. 1988. Geology of the Eyemouth district. Memoir of the British Geological Survey, Sheet 34 (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used: