Archean and Proterozoic Gneiss
Archean and Proterozoic gneisses appear in Scandinavia (the Baltic Shield).
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Boulder of gneissic breccia on Osmussaar, Estonia, apparently thrown there by the Neugrund impact
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Study of Gneiss Rock, Glenfinlas, the Trossachs, Scotland. A pen and ink study by John Ruskin, 1853, is now in the Ashmolean Museum, Oxford.