The BGS Lexicon of Named Rock Units — Result Details

Loch Katrine Volcaniclastic Formation

Computer Code: LKV Preferred Map Code: LKVF
Status Code: Full
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Metasandstone, arenite to wacke, pale to dark grey green and dark green ('Green Beds'), commonly orange- to pink-brown weathering. Fine- to very coarse-grained, graded to massive, interbedded with subsidiary semipelite and pelite. Contains locally abundant chlorite and epidote originally of volcanic origin.
Definition of Lower Boundary: Outgoing of clean arenite and quartz arenite of the Ardnandave Sandstone Formation and the incoming of chloritic and epidotic, greenish silicaclastic sediments.
Definition of Upper Boundary: Outgoing of chloritic, greenish rocks and incoming of clean coarse arenites/quartz arenites (Creag Innich Sandstone) or more matrix rich arenites and wackes (Ben Ledi Grit Formation).
Thickness: 1000m estimated
Geographical Limits: 'Green Beds' that can be correlated with this formation crop out widely throughout the lower part of the Southern Highland Group in the Scottish Southern Highlands between Loch Lomond and Glen Clova and into Kintyre and Northern Ireland.
Parent Unit: Southern Highland Group (SOHI)
Previous Name(s): Greenbeds (-3526)
Alternative Name(s): none recorded or not applicable
Type Section  Road section along the north shore road of Loch Katrine, between the Glen Finglas outfall tunnel and the Silver Strand. 
Reference Section  In prominent cliffs at Bealach nam Bo; south side of Loch Katrine. 
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used: