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The Ballantrae ophiolite in southern Scotland includes a NEE–SWW-trending serpentinite mélange that contains blocks of mafic blueschist and high-pressure, granulite facies, metapyroxenite (Sm–Nd metamorphic age: 576±32 and 505±11 Ma). Tectonic blocks of mafic schist are less than 3×3 m in size, and have greenschist, blueschist or epidote amphibolite facies assemblages corresponding to the high-pressure...
A 560–550Ma, 5km×25km Blueschist Unit extends NE–SW on the island of Anglesey, Wales, UK, and continues to the southwest for more than 70km along the northern coast of the Lleyn Peninsula. It has the shape of a shallow-dipping slab or sheet up to a few kilometres thick that was exhumed from the subduction zone and emplaced into the accretionary complex to the northwest. Today the top boundary of the...
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