I have seen a few of these on Mull and elsewhere. On Ardnamurchan the is the a Big Feldspar Porphyry with phenocrysts the size of fag packets(!) - it’s by the public toilets

Spectra Festival School of Geosciences, University of Aberdeen 600 through the door yesterday, the same expected tomorrow. spectrafestival.co.uk/artworks/what-…

Slab window–related magmatism as a probe for pyroxenite heterogeneities in the upper mantle | Geology | GeoScienceWorld pubs.geoscienceworld.org/gsa/geology/ar…