Rock 365 : Day 258 : Quartz Feldspar Porphyry
Day 258 : This is a quartz feldspar porphyry from the Drumadoon Sill on the west coast of the Isle of Arran, Scotland. Keele collection.
Day 258 : This is a quartz feldspar porphyry from the Drumadoon Sill on the west coast of the Isle of Arran, Scotland. Keele collection.
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