Description Basalt of Red Hill. Section of plagioclase perpendicular to the edge P/M, with the traces of two cleavages parallel P and M; on the right, remains a part of an individual twinned following the albite law. 1/20 crossed nicols.
Plaats: Ascension IslandAuthor Anoniem in Renard (1888)JPG file - 214.70 kB - 555 x 669 pixelsadded on 2012-07-16639 viewsFrom reference Renard, A. (1888). Report on the rock specimens collected... (page 64)