Ballyknockan Granite

Example of the stone type
Material:
Granite
Category:
Plutonic, Igneous
Alternative name(s):
Wicklow Granite
Colour:
Pale Grey
Colour variation:
Uniform
Grain/Crystal Size:
Medium
Place of origin:
Wicklow, Ireland
Rock Unit Name:
Leinster Granite, Northern Pluton Type 2e (equigranular)
Geological Age:
Devonian
GSI Rock Unit Code:
Nt2e
Context of Use:
Building
Related Material (same rock unit):
Golden Hill Granite, Ballybrew Granite, Glencree Granite, Granabeg Granite, Northern Pluton Type 2e Granite

Notes:

A fine-grained intrusive igneous rock composed of crystals of clear, glassy quartz, white feldspar, and two varieties of mica: black biotite and silver muscovite. Crystals are approximately 3 mm in size, closely interlocking resulting in a porosity of low to none, which is confirmed in thin section.

References

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