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Gallery - Image 30

View of the Ardnamurchan volcono, showing the circular form of the ring dyke' magma intrusions.ŠP&A Macdonald/SNH

An aerial view of the Ardnamurchan volcano that dates from the Palaeogene geological period around the 60 million years ago. The concentric circular forms are ring dyke magma intrusions, representing the eroded roots of the volcano.  © P&A Macdonald/SNH

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