Synopsis

The Glenelg-Attadale Inlier contains Proterozoic eclogites and Late Archaean mafic high-pressure granulites. Eclogites were formed both in the Palaeoproterozoic (around 1.75 Ga) and the Mesoproterozoic (around 1.1 Ga). The inlier is the only place in the British Isles that contains significant and unequivocal crustal eclogites and furthermore is one of the few places that retains clear evidence of having been strongly affected by the c. 1.1–1.0 Ga Grenvillian orogeny. The excursions provide an opportunity to study these rare rocks and gain insight into how they formed and how they were exhumed back to the surface.

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