Browse Items (1651 total)

Coarse, with white veins and orange coloration

Not dark phonolite facies

Not as messy as garnet psuedolucite syenite at Diamond Joe Quarry

From within visible biotite zone

Coarse, muddy, with many small glinting faces

Altered

Coarse grained, comes from dike-like body in northern part of the quarry

Gray, less mafic than average
Representative of main rock type in quarry

Mica schist containing coarse (altered) andalusite crystals

Mica-based schist containing significant quartz

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

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

Dark, banded

Synkinematic deformed gneiss w/ augen-like feldspar ribbons

Example of the Dakin Hill Member. Porphyroblastic gneiss.

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

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