Connecticut
Metamorphic Rocks
Scroll down to see all the Metamorphic
Rocks:
Gneiss
Medium to coarsegrained.
Colors: Light and
dark occurring as
bands or stripes.
Very hard rock.
Chunky in shape.
Forms when
igneous,
sedimentary, or
metamorphic rocks
are changed by lots
of heat and pressure.
Schist
Medium to coarsegrained rock usually
covered with shiny
mica flakes.
Colors- Usually
silvery, sometimes
gold colored.
Soft to medium hard
rock. Mica easily
flakes off. Found
often in layers. Splits
into flat layers.
Forms when igneous
or sedimentary rocks
are changed by heat
and pressure, but
not as much as in
gneiss.
Phyllite
Fine- grained.
Color: Greenishgray. Has a shiny
"greasy" look.
Medium-soft rock
which splits into
wavy layers with
sharp edges.
Forms when igneous
or sedimentary rocks
are changed by heat
and pressure, but
not enough heat and
pressure to become
schist.
Marble
Fine- grained.
Color: White
(sometimes with
dark swirls).
Very hard rock.
Chunky in shape.
Found in layers.
Forms when
limestone is
changed by heat and
pressure.
Quartzit
e
Medium to finegrained.
Colors: Tan, or white
Hard rock with
sandpaper-like
surface. Chunky in
shape.
Rounded pebbles
often found on the
beach.
Forms when the
mineral quartz (such
as in quartz
sandstone) is
changed by heat and
pressure.