Amphibolite, Garnet zone (Sample
is Grt + Hbl + Pl + Ep + Bt + Qtz.
The abundant amphibole is a dark blue-green,
strongly-pleochroic Al-bearing hornblende, as
opposed to the Al-poor actinolite of the
greenschist. The plagioclase, forming large clear
patches studded with epidote inclusions and small
biotite flakes, is oligoclase-andesine. Garnet
forms scattered subhedral to euhedral
Field of view
is 3.5 mm wide.