Rocks Types of Rocks Sedimentary Rocks Metamorphic Rocks Igneous Rocks.
Types Of Rocks
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Types of Rocks
Sedimentary, Igneous, Metamorphic
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Sedimentary Rocks
• Made up of smaller rocks cemented together
• Sometimes have fossils• Usually have layers.
![Page 3: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/3.jpg)
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.
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Sedimentary Rocks
![Page 5: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/5.jpg)
Examples of Sedimentary Rocks
![Page 6: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/6.jpg)
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)
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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.
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Igneous Rocks
• Which is extrusive and which is intrusive?
Extrusive
Intrusive
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Igneous Rocks
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Examples of Igneous Rock
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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)
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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.
![Page 13: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/13.jpg)
Metamorphic Rocks
![Page 14: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/14.jpg)
Examples of Metamorphic Rocks
![Page 15: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/15.jpg)
![Page 16: Types Of Rocks](https://reader034.fdocuments.in/reader034/viewer/2022042714/5557459cd8b42aa8378b4c59/html5/thumbnails/16.jpg)
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?
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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.