Browse Items (22 total)

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

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

Mica schist containing coarse (altered) andalusite crystals

Dark, banded

Phyllite containing porphyroblasts of garnet

Micaceous schist containing porphyroblasts of garnet and staurolite.

Described as a "banded injection gneiss".

Example of the Dakin Hill Member. Porphyroblastic gneiss.

Synkinematic deformed gneiss w/ augen-like feldspar ribbons

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

Gneiss with a migmatitic fabric. Also contains quartz-feldspar pods.

This foliated sample is dominated by micas and quartz. It is a sample from the Hubbard Hill member.

Mica-based schist containing significant quartz

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

Muscovite-sillimanite schist where much of the sillimanite has been somewhat altered to muscovite. This sample may also contain muscovite pseudomorphs after staurolite.

Black slate