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Renard (1888, fig. 25)
Description 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
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added on 2012-07-16456 viewsFrom reference Renard, A. (1888). Report on the rock specimens collected... (page 142)
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