(LT) Littleton Formation Metamorphic Suite -- New Hampshire
Title
(LT) Littleton Formation Metamorphic Suite -- New Hampshire
Collection Items
Sillimanite-bearing biotite schist
Muscovite-sillimanite schist where much of the sillimanite has been somewhat altered to muscovite. This sample may also contain muscovite pseudomorphs after staurolite.
Quartzose Mica schist
This foliated sample is dominated by micas and quartz. It is a sample from the Hubbard Hill member.
Biotite gneiss
Dark, banded
Gneiss
Synkinematic deformed gneiss w/ augen-like feldspar ribbons
Gneiss
Example of the Dakin Hill Member. Porphyroblastic gneiss.
Migmatitic biotite gneiss
Gneiss with a migmatitic fabric. Also contains quartz-feldspar pods.
Mica schist
Muscovite-biotite schist
Mica staurolite 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
Described as a "banded injection gneiss".
Andalusite schist
Mica-based schist containing porphyroblasts of andalusite (chiastolite) which have been partly retrograded to muscovite
Sillimanite schist
Muscovite-biotite schist containing large sillimanite crystals-mostly retrograded to muscovite
Staurolite schist
Mica-based schist with porphyroblasts of staurolite.
Garnet staurolite schist
Micaceous schist containing porphyroblasts of garnet and staurolite.
Garnet phyllite
Phyllite containing porphyroblasts of garnet
Amphibolite
Sample contains porphyroblasts of poikilitic hornblende. Thought to represent Na-rich volcanic units.
Slate
Dark-colored slate that is slightly phyllitic.
Slate
Black slate
Andalusite Schist
Mica schist containing coarse (altered) andalusite crystals