Description Trachyte of Red Hill. Small twinned crystals of sanidine, two tabular individuals superimposed on the face M, the traces of P y, and in the internal zones, the trace of x can be seen; the angle P P’ is about 127°. 1/60 crossed nicols.
Plaats: Ascension IslandAuthor Anoniem in Renard (1888)JPG file - 233.43 kB - 493 x 705 pixelsadded on 2012-07-16520 viewsFrom reference Renard, A. (1888). Report on the rock specimens collected... (page 52) This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License