Akaisha Katyal - Types of rocks PPT

Types OF
ROCKS

Made by – Akaisha Katyal

There are three types of 1. Igneous Rocks
rocks that are : 2. Sedimentary Rocks
Metamorphic Rocks
3.

IGNEOUS ROCKS : DID YOU KNOW :
THE LIGHTESET ROCK ON THE EARTH IS AN IGNEOUS ROCK,
Igneous Rocks are the rocks which are formed PUMICE IT IS SO LIGHT THAT IT CAN FLOAT ON WATER..
due to the cooling and solidification of magma or
lava. Solidification into rock occurs either below the
surface as intrusive rocks or on the surface as
extrusive rocks. Some examples of Igneous rocks are

Granite, Pumice, Basalt and Obsidian.

Sedimentary rocks :

Sedimentary rocks are formed by small pieces of rocks and soil, DID YOU KNOW: MONUMENTS LIKE QUTAB MINAR AND
settle down to form layers called sediments. As more and more RED FORT ARE MADE UP OF SANDSTONE, A
layers pile up, the layers below get squeezed together. Due to SEDIMENTARY ROCK.

the continuous pressure, the bottom layers harden. Hence
causing the formation of Sedimentary Rocks. Some examples of
them are Limestone, Shale, Sandstone and Conglomerate.

METAMORPHIC ROCKS DID YOU KNOW :
THE TAJ MAHAL IS MADE UP OF WHITE MARBLE, A
Metamorphic rocks are formed from igneous or METAMORPHIC ROCK.
sedimentary rock. When igneous or sedimentary
rocks are subjected to intense heat and pressure
inside the Earth, the minerals present in these
rocks undergo change, turning into metamorphic
rocks. Some examples are Marble, Slate, Gneiss

and Quartzite.

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