This photomicrograph shows a serpentinite in a polarizing petrographic microscope. During reaction with seawater serpentine (the grey, "snake-like" minerals) forms what is called a mesh texture around olivine grains. The light colored, round minerals are relict grains of olivine. Field of view is 2.5 mm. Image courtesy of G. Fruh-Green.
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The Lost City: Serpentinization
Download high-resolution Photomicrograph of a serpentinite (jpg, 1.4 Mb)