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Description Trachyte of Weather Post Hill. Section of Sanidine cut almost parallel to P/M, Carlsbad twin. The composition plane is M, and an other face probably
probably ∞ P 3. 1/20 crossed nicols.Plaats: Ascension IslandAuthor Anoniem in Renard (1888)JPG file - 397.64 kB - 760 x 989 pixelsadded on 2012-07-16505 viewsFrom reference Renard, A. (1888). Report on the rock specimens collected... (page 51) This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License