let's explore about rocks!!!

3. - magma is the parent material,
a molten material from deep
within earth that cools and
hardens. This is an exothermic
process (heat is liberated) and
involves a change of phase from
the liquid to solid state.

4. -most
abundant
rocks

5. Hard and
tough

11. There are many varieties of
igneous rocks and they are given
names based upon 2 things:
A.TEXTURE
-relates to the general appearance of an
igneous rocks. The texture of an
igneous rock is strongly affected by
the rate of cooling of the magma that
results in the formation of crystals.
These crystals are actually minerals.

12. Usually, the slower the rate of
cooling, the larger the crystals
found in the rock resulting in a
coarse-grained igneous rock.
On the other hand, the faster
the rate of cooling, the smaller
the crystals are and resulting
into a fine-grained igneous
rock.

13. Coarse-grained
varieties are
considered phaneritic
while fine-grained
varieties are
considered aphanitic.

14. b. Composition
- Refers to the elements
in the magma that
directly affect the kind
of mineral that is
formed when the

15. The composition of igneous
is directly related to where
the magma is formed.
Magmas associated with
crustal spreading are
generally mafic while
magmas associated with
crustal compression and
subduction are termed felsic.

16. Igneous rocks may
differ in texture but
they can be the
same in terms of
composition.

17. TYPES OF IGNEOUS ROCKS