- Material:
- Sandstone
- Category:
- Siliciclastic, Sedimentary
- Alternative name(s):
- Carlow Flags
- Colour:
- Black
- Colour variation:
- Dark grey
- Grain/Crystal Size:
- Fine
- Place of origin:
- Laois, Ireland
- Rock Unit Name:
- Bregaun Flagstone Formation
- Geological Age:
- Carboniferous, Namurian, Yeadonian
- GSI Rock Unit Code:
- BE
- GSI Rock Unit Summary:
- Thick-bedded flaggy sandstones and siltstones.
- Context of Use:
- Used for paving and general vernacular building.
Notes:
A black to dark grey fine grained sandstone often containing the trace fossil Olivellites. These were described and figured in a Geological Survey of Ireland Memoir by William Hellier Baily (1859, p. 14, fig. 3 and 16, fig. 4) and by Samuel Haughton (1858, p. 87, 184–185, plates 8–11). [Haughton's specimens are in the Geological Museum, Trinity]. Very similar to Liscannor Flagstone and the Carlow flagstones from Kellymount and Shankill, Co. Kilkenny; they were marketed under the name 'Carlow Flags' (Kinahan in Jukes et al. 1859, p. 26).References
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