Stratigraphic range: Carboniferous
|Sub-units||Lower Limestone Formation, Limestone Coal Formation, Upper Limestone Formation, Passage Formation|
|Underlies||Coal Measures Group|
|Other||limestones, siltstones, ironstones, coal, seatrocks, fireclay|
|Region||Central Lowlands of Scotland|
|Named for||Clackmannan (town)|
The Group comprises a lower unit of coarse sandstones, siltstones, mudstone, and limestones with thin coals and ironstones known as the Lower Limestone Formation, an overlying sequence of similar rocks known as the Limestone Coal Formation, then an Upper Limestone Formation and at its top the sandstones of the Passage Formation. This last formation also includes fireclays, siltstones, mudstones, ironstones, coal and seatrocks.
- "Clackmannan Group". The BGS Lexicon of Named Rock Units. British Geological Society. Retrieved 27 February 2014.
- British Geological Survey Research Report RR/07/01: Lithostratigraphical framework for Carboniferous successions of Great Britain (Onshore) Waters, C.N. et al 2007
- British Geological Survey 1:50,0000 scale geological map sheet (Scotland) 23W Hamilton