Renard (1888, fig. 25)
Beschrijving: Basalt in contact with phonolite from Greenland Harbour. Group of plagioclase epigenised into opal on the upper part, transformed into chalcedony on the lower. 1/20 crossed nicols. Polarised light.
Plaats: Kerguelen Island
Auteur: Anoniem in Renard (1888)
Uit bron: Renard, A. (1888). Report on the rock specimens collected... (pagina 142)
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