Ballyshannon Limestone

Material:
Limestone
Category:
Carbonate, Sedimentary
Colour:
Brownish-Grey to Dark Greyish Blue
Place of origin:
Donegal, Ireland
Rock Unit Name:
Ballyshannon Limestone Formation
Geological Age:
Carboniferous, Dinantian
GSI Rock Unit Code:
BS
Context of Use:
Used as a building stone in the vicinity of Ballyshannon
Related Material (same rock unit):
Castle Caldwell Marble

Notes:

Pale grey calcarenite limestone; most of the formation is composed of medium to light grey, massively bedded crinoidal calcarenite. Stylolites are common and are often the only indication of bedding. Very dark grey fine calcarenites with black chert nodules are interspersed (GSI). Earthy; compact; semi-crystalline; works freely and well.

References

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