At the top of the field of view is an area of sodian clinopyroxene with locally extensive development of plagioclase (Ab-66) in a vermiform intergrowth. At the bottom of the view is a mass of micron-scale symplectite of corundum and nearly pure anorthite. This region is interpreted to have been where a crystal of kyanite resided within sodian clinopyroxene, and has since been consumed in reaction, and some of the reaction products consumed to make still other products. From the bottom up: corundum+anorthite symplectite, sapphirine+anorthite symplectite, plagioclase zoned from anorthitic to much more albitic compositions, orthopyroxene(black)+plagioclase, clinopyroxene+plagioclase symplectite, and finally locally pristine sodian clinopyroxene.
For more information about this image contact: Michael L. Williams