Browse Items (1651 total)

Muscovite-biotite schist

Micaceous schist containing staurolite. Note that the staurolite is only found in the pelitic layers and is absent in the quartz-rich layers

Described as a "banded injection gneiss".

Mica-based schist containing porphyroblasts of andalusite (chiastolite) which have been partly retrograded to muscovite

Muscovite-biotite schist containing large sillimanite crystals-mostly retrograded to muscovite

Mica-based schist with porphyroblasts of staurolite.

Micaceous schist containing porphyroblasts of garnet and staurolite.

Phyllite containing porphyroblasts of garnet

Sample contains porphyroblasts of poikilitic hornblende. Thought to represent Na-rich volcanic units.

Dark-colored slate that is slightly phyllitic.

Black slate

Dense

Contains mica veins

Fine grained

coarse grained, with large tabular slabs of float

contains clots of black spheroids