The rock cycle describes how rocks continuously change from one type to another through geological processes such as weathering, erosion, deposition, burial, and melting. Igneous rocks form from cooling magma and are later exposed at the surface, where weathering breaks them into sediments that are transported and deposited to form sedimentary rocks. Increased heat and pressure can metamorphose sedimentary and igneous rocks into new metamorphic rocks. Metamorphic rocks may then melt to form new magma, restarting the cycle. The rock cycle does not always follow the same linear path, as shortcuts allow rocks to transition directly between types.

1. Presented By:
Ali Bux Wassan
Department of Mining
Engineering,
MUET, Jamshoro

2. Rock Cycle
Rock Cycle, is an endless process
through which rocks change form one
kind to another kind of rock.
The rock cycle illustrates the role of
various geological processes which act
to transform one rock into another.

3. The igneous rocks are the prime
most rocks which solidify from a
molten mass magma
When these rocks are exposed on
the surface of earth

4. These are disintegrated by the
weathering agents into loose
material.
This material is subjected to
transportation by wind, water or
glacier

5. After moving some distance , these
loose sediments may again come to
rest and get deposited in layers to
form the sedimentary rocks
through process of lithification

6. These igneous and sedimentary
rocks may be subjected to a new
environment of great heat and
pressure , that change these rocks
into a new type of rock i.e.
metamorphic rock

7. The metamorphic rocks can be further
subjected to over-powering, stress,
heat and may be melted to form
magma
The full cycle just described doesn’t
always take place in the same manner
but short cuts are also there

8. For Example:
 An igneous rock rather than being exposed
to weathering may be subjected to heat and
pressure (metamorphism) and change to
metamorphic rock.
 On the other hand, metamorphic rocks and
sedimentary rocks may be exposed to the
surface and transformed into new raw
material for sedimentary rock.

10. Thank You
for your
kind
Attention