1. Metamorphic Rocks

2. Metamorphic means
“change of form” in Greek.
Metamorphic rocks were all
once other kinds of rocks.
They were CHANGED to
become metamorphic rocks.

3.  Metamorphic rocks are
made by heat and
pressure.
 When rocks are close to
the mantle (by the hot
magma) they are
changed.
 When rocks are pushed
down below other rocks
(plate movement) then
the pressure also changes
rock into metamorphic.

4. Metamorphic rocks are also
made when plate are
pushed together. The
pressure from two huge
tectonic plates can change
rocks into metamorphic.

5. Shale turns to
Slate
Schist turns to
Gneiss

6. Minerals in Metamorphic Rocks
 Rocks are made of minerals. Minerals in metamorphic rocks
become tightly packed and large. (can CHANGE minerals into
different minerals)
 Minerals only found in metamorphic rocks:
 Chlorite
 Garnet
 Staurolite
 kyanite

7. Identifying Metamorphic Rocks
Rock Color Foliated Grain Size
Slate Dark gray Yes fine
Schist Mixture No Medium
Gneiss Pink/gray Yes coarse
Marble Light No Coarse
Quartzite Light Not coarse

8. Using Metamorphic Rocks
Metamorphic rocks
are used for many
different things.
Marble is commonly
used for buildings
and sculptures.
Slate is used to
make tiles for roofs.