III. Metamorphic Rocks – Rocks formed by
great heat (100 – 800 Celsius) and pressure
causing chemical change
They can be formed by one of two ways
A. Contact Metamorphism – a change of an
existing rock by being in close proximity to
a mass of magma
B. Regional Metamorphism – A change in a
large area of rock due to heat and pressure
from tectonic activity (movements in the
earth’s crust)
Metamorphic rocks are classified into two
groups
1. Foliated – rocks showing bands of light
and dark layers due to the arrangement
of minerals.
Ex. Shale (sed)  Slate PhylliteSchist
Ex. Granite (igneous)  Gneiss
2. Non-foliated – Rocks without bands of
mineral crystals
Ex. Limestone (sed)  Marble
Ex. Sandstone (sed) Quartzite
III. Metamorphic Rocks – Rocks formed by great heat and
pressure causing chemical change
They can be formed by one of two ways
A. Contact Metamorphism –
B. Regional Metamorphism –
Metamorphic rocks are classified into two groups
1. Foliated – rocks showing bands of light and dark
layers due to the arrangement of minerals.
Ex.
Ex.
2. Non-foliated – Rocks without bands of mineral
crystals
Ex.
Ex.