National Geographic

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Erebus_Fig_11_anorthoclase_bse_Ca copy

Plate 6: Backscattered electron image (BSE) and Ca element map of a single anorthoclase mega crystal from Erebus volcano. The darkest areas in the BSE image are the anorthoclase crystal. The abundant irregular areas, slightly brighter than the anorthoclase, are melt inclusions. Other included mineral phases are pyroxene (light grey phase on Ca map), apatite (next brightest on BSE, highlighted in red on Ca map) and magnetite (brightest in BSE, dark on Ca map). Taken from Sims et al., 2012; Journal of Petrology; http://petrology.oxfordjournals.org/content/early/2012/10/13/petrology.egs068.abstract