Olivine

This figure shows a BSE image of olivine grains (intermediate gray-scales) and interstitial basaltic melt (white). Cracks (black) are due to rapid decompression of the sample during quench from high pressure and temperature conditions. The different gray-scales of the olivine grains are not due to compositional variations, but different crystallographic orientations of the grains in the plane of the section.

Image supplied by Dr Uli Faul, RSES, ANU