METAMORPHIC ROCKS
7 TH G R A D E S C I E N C E
METAMORPHIC ROCKS
• Metamorphic Means to Change Form
METAMORPHIC ROCKS
• Heat and pressure
deep beneath the
earths surface can
change any rock.
METAMORPHIC ROCKS
• Geologists classify
metamorphic rocks
according to the
arrangement of the
grains that make up
the rocks
METAMORPHIC ROCKS
• Foliated Rocks
Metamorphic rocks
that have their
grains arranged in
parallel layers or
bands (foliated)
which means thin
flat layering found
in most
metamorphic rocks
• Slate, schist, gneiss
METAMORPHIC ROCKS
• Nonfoliated rocks
• Mineral grains are
arranged randomly.
• Do not split into layers
• Marble and quartzite