This Presentation is About:

Igneous Rocks

Sedimentary Rocks

Metamorphic Rocks

Igneous RockIgneous rock is formed from molten rock that

hardened into a solid state.

Forming Igneous Rocks

Types of Igneous Rock

• There are two types of igneous rock:

Extrusive, which forms from lava that hardens on Earth’s surface.

Intrusive, which forms from magma that hardens beneath Earth’s surface.

Molten Rock Above Surface (Lava)

Lava Cools Quickly and Hardens into

Extrusive Rock

Extrusive Rock

Extrusive rock formation - cooling lava

Molten Rock Below Surface

(Magma)

When the Volcano Stops Erupting, the Magma Cools Slowly and Hardens into Intrusive Rock

Intrusive Rock

Igneous Rock Types

Coarse grained

Granite

Sedimentary Rock

Sedimentary rock is made of sediment that has been deposited, compacted, and cemented.

Sedimentary Rock - layers

Types of Sedimentary Rock

• There are three types of sedimentary rock:

Clastic, which is formed when rock fragments are squeezed together.

Organic, which forms when the remains of plants and animals are deposited in thick layers.

Chemical, which forms when minerals that are dissolved in a solution crystallize.

Sedimentary Rock

Metamorphic Rock

Metamorphic rock is any rock that has gone under immense heat and pressure to

transform into another rock.

How Metamorphic Rocks are Formed

Magma

Earth’s Crust

Rock Layers

HEAT AND PRESSURE

Metamorphic Rock Forming

Types of Metamorphic Rock

• There are two types of Metamorphic rock:

Foliated, which is when the rock grains are arranged in parallel layers or bands.

Nonfoliated, which is when the rock grains are arranged randomly.

Foliated Rock

Nonfoliated Rock

Metamorphic Rock

Foliated Metamorphic Rock –Slate

Non-Foliated Metamorphic Rock - Marble

The Rock Cycle

The Rock Cycle