Page 119 - Active Science 5 Ebook and Activity

Metamorphic Rocks
Sometimes physical and chemical changes due to heat and pressure lead to transformation

in the igneous and sedimentary rocks. This results in complete alteration and formation
of new rocks. Such rocks are called metamorphic rocks. Some common examples of
metamorphic rocks are slate, gneiss, quartzite and marble.

1. Slate: It is formed from shale. It also

exists in thin layers which makes it
an ideal roofing material and is used
in making bricks, cements, slates
for children and blackboards for Slate

classrooms.

2. Gneiss: It is transformed granite
with light and dark bands of different
thickness and length. It is a very

useful rock, used for making building
material.
Gneiss
3. Quartzite: It is formed by the
transformation of sandstone. These are
hard rocks that contain iron, quartz and

silica. It is not easily broken. Quartzite
is used in making statues, floorings
and stairs. It is also used in glass and Quartzite
ceramic industries.

4. Marble: Marble is formed from
limestone. Limestone undergoes changes
to form marble. It is cut, polished and
made very smooth. It is used to make
buildings. The Taj Mahal in Agra is built

from white marble. Marble floorings
enhance the beauty of a building as
they reflect light. Artists have carved

beautiful designs on marble rocks to
create magnificent monuments.
Taj Mahal (Marble)

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