Retrograded eclogite   The presence of amphibole (probably hornblende) is a tip-off that this eclogite has been subjected to retrograde metamorphism. Note the reaction relationship between clinopyroxene and amphibole in the upper right. Sorry for the poor quality of this photo! Can you guess why the right side of this photo is darker than the left?		UNC sample SA-20
		Rock type retrograded eclogite
		Locality ?