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pitchstone; porphyritic with phenocrysts of clinopyroxene and plagioclase ("Tormore type") in crystallite-rich glass

An Cumhann, Tormore, Arran Scotland dyke:i: MANU HERRIOT, Alex late C20th East Kilbride Scotland original locality reads "(Comp. dyke, Judd II, said P.J.R.)". Slide number AH:801 from the collection bequeathed by Alex Herriot of East Kilbride, in 1998.