The BGS Lexicon of Named Rock Units — Result Details

Cheviot Volcanic Formation

Computer Code: CHEV Preferred Map Code: notEntered
Status Code: Full
Age range: Early Devonian Epoch (DL) — Early Devonian Epoch (DL)
Lithological Description: A thick pile of andesitic lava with associated pyroclastic and reworked volcanic rocks, subordinate biotite-phyric rhyolite and tuff.
Definition of Lower Boundary: The base of the volcanic rocks resting unconformably on Wenlock strata or, locally the White Hill Sandstone Formation.
Definition of Upper Boundary: The top of the volcanic pile, uncomnformably overlain by the upper Devonian to lower Carboniferous rocks.
Thickness: At least 1000 m thick.
Geographical Limits: The Cheviot Hills in Northumberland and the Scottish borders.
Parent Unit: Reston Group (REST)
Previous Name(s): Cheviot Volcanic Series (-125)
Cheviot Volcanic Group (-2692)
Cheviot Lavas [Obsolete Name And Code: Use CHEV] (CHV)
Alternative Name(s): none recorded or not applicable
Type Area  The valley of the River Alwin, Cheviot Hills, Northumberland. Carruthers et., 1932. 
Mykura, W. 1991. Old Red Sandstone. 297-346 in Geology of Scotland (3rd edition, revised). Craig, G Y (editor). Geological Society of London. 
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. 
Carruthers, R G, Burnett, G A and Anderson, W. 1932. The geology of the Cheviot Hills. Memoir of the Geological Survey of Great Britain, Sheets 3 and 5 (England and Wales). 
House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S017 S018 S026 E005 E006 E008 E003 S025