Types of Rocks Sedimentary, Igneous, Metamorphic

Sedimentary Rocks Made up of smaller rocks cemented together Sometimes have fossils Usually have layers.

Made up of smaller rocks cemented together

Sometimes have fossils

Usually have layers.

Sedimentary Rocks Form when loose sediment (rocks, sand) is deposited by water, compacted, and cemented together. Form as a chemical reaction in the water that leaves a chemical deposit, usually on an ocean bottom. Form along beaches, by rivers, or under the water in lake or oceans.

Form when loose sediment (rocks, sand) is deposited by water, compacted, and cemented together.

Form as a chemical reaction in the water that leaves a chemical deposit, usually on an ocean bottom.

Form along beaches, by rivers, or under the water in lake or oceans.

Sedimentary Rocks

Examples of Sedimentary Rocks

Igneous Rocks Some were once liquid magma that erupted from volcanoes. They cooled very quickly. (Extrusive) Others were once liquid magma, but they did not erupt from volcanoes. Instead, they cooled slowly underground. (Intrusive)

Some were once liquid magma that erupted from volcanoes. They cooled very quickly. (Extrusive)

Others were once liquid magma, but they did not erupt from volcanoes. Instead, they cooled slowly underground. (Intrusive)

Igneous Rocks Extrusive: Rocks that are from cooled lava (above ground. They cooled very quickly, therefore formed small crystals Intrusive Rocks that are from cooled magma (below ground) They cooled very slowly, therefore formed large crystals.

Extrusive:

Rocks that are from cooled lava (above ground.

They cooled very quickly, therefore formed small crystals

Intrusive

Rocks that are from cooled magma (below ground)

They cooled very slowly, therefore formed large crystals.

Igneous Rocks Which is extrusive and which is intrusive? Extrusive Intrusive

Which is extrusive and which is intrusive?

Igneous Rocks

Examples of Igneous Rock

Metamorphic Form when igneous, sedimentary, or other metamorphic rocks are heated and/or squished, forming a new rock type. Usually has interlocking crystals and layers (called foliation)

Form when igneous, sedimentary, or other metamorphic rocks are heated and/or squished, forming a new rock type.

Usually has interlocking crystals and layers (called foliation)

Metamorphic This can either happen underground or above ground. Underground: high pressure and heat Above ground: volcano erupting When classifying metamorphic rocks, they always come from a parent rock.

This can either happen underground or above ground.

Underground: high pressure and heat

Above ground: volcano erupting

When classifying metamorphic rocks, they always come from a parent rock.

Metamorphic Rocks

Examples of Metamorphic Rocks

Review What are the three rock types? What are sedimentary rocks? What are igneous rocks? What are the two types of igneous rocks? What are metamorphic rocks?

What are the three rock types?

What are sedimentary rocks?

What are igneous rocks?

What are the two types of igneous rocks?

What are metamorphic rocks?

Copyright Information All information was retrieved from research done on the internet in February 2007. All pictures were retrieved from a Yahoo image search in February 2007.

All information was retrieved from research done on the internet in February 2007.

All pictures were retrieved from a Yahoo image search in February 2007.