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Description Amphibolic granite. Section of orthoclase with veinules of albite ranged in lines following the prismatic cleavage (microperthite). 1/40 crossed nicols.Plaats: Ascension IslandAuthor Anoniem in Renard (1888)JPG file - 398.44 kB - 807 x 788 pixelsadded on 2012-07-16765 viewsFrom reference Renard, A. (1888). Report on the rock specimens collected... (page 70) This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License