This sample was presented to UCL Department of Earth Sciences, in the early 1970s by George Walker of Imperial College. He writes to Maurice Wells “I thought you might like a piece of type foyaite from Monchique, Portugal. I collected a lot recently from there. Quite a handsome rock but used on only a very small scale as an ornamental stone.

Foyaite (Marron San Luis); Lugar di Nave, Monte Foia, Serra do Monchique, Algarve, Portugal






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