FIGURE 1. Photomicrograph of a plagioclase phenocryst with a melt inclusion.
From the following article:
Volcanoes: Interpreting inclusive evidence
Julia E. Hammer
Nature 439, 26-27 (5 January 2006)
doi:10.1038/439026a

This backscattered electron image shows the microtexture of a Mount St Helens lava-dome sample erupted in September 1981. PM, plagioclase microlite; PP, plagioclase phenocryst; MI, melt inclusion; V, vesicle (relict vapour bubble).
