| Great Scar Limestone Group | |
| Type: | Group |
| Age: | Arundian-Brigantian |
| Period: | Visean |
| Prilithology: | Limestone |
| Otherlithology: | Mudstone, siltstone, sandstone |
| Region: | England |
| Unitof: | Carboniferous Limestone Supergroup |
| Subunits: | See text |
| Underlies: | Yoredale Group |
| Overlies: | Ravenstonedale Group |
| Thickness: | Up to 800m (2,600feet) |
The Great Scar Limestone Group is a lithostratigraphical term referring to a succession of generally fossiliferous rock strata which occur in the Pennines in northern England and in the Isle of Man within the Tournaisian and Visean stages of the Carboniferous Period.
It is contained within the Carboniferous Limestone Supergroup.[1]
The sequence in the Stainmore Trough is thus (youngest at top):
On the Alston Block corresponding to the North Pennines, the sequence contains the Melmerby Scar Limestone Formation.
In the Orton area, the sequence is:
In south Cumbria, the sequence is:[2]
On the Isle of Man, the following sequence is identified in the Castletown area:[3] [4]