2011
NS3974 : Cementstone with calcite veins
taken 13 years ago, near to Dumbarton, West Dunbartonshire, Scotland
Cementstone with calcite veins
Dumbarton Rock and Castle :: NS4074
The Rock is a volcanic plug, and it has a long history as a fortified site. For further information, see the Geograph article "Dumbarton Rock and Castle": Link