Transcript NY Metamorphic rocks (Orgonik)

MESSSAGES IN STONE
Piecing Together New York’s
Geologic History by Reading
the Stories in Metamorphic Rocks
What processes form metamorphic rock?
What evidence do we have that the
rocks of the Earth have been put under
PRESSURE?
What type of rocks are these?
Layered Sedimentary Rocks NOT under pressure!
For comparison, where do
you see rocks changed by
pressure here?!
CENTRAL PARK
SQUEEZED ROCKS!
How do we find these
areas on our NYS map?
Harriman State Park
Bear Mountain
FOLIATION
Mineral grains that have lined up due to
pressure squeezing them together
Where else in NY would you
expect to find metamorphic
rocks?
There is a relationship between metamorphic rocks and
what landscape feature?
Adirondack Mountains
Taconic Mountain Area
What events
formed the
these
mountains?
Proterozoic
What processes form mountains and create the pressure
that creates metamorphic rocks?
CAUMSETT STATE PARK
What story does this rock tell?
Quartz vein
The Rock Before…
And after a major earthmoving event!