Rocks

What is a Rock? ,[object Object]

What is a Rock? ,[object Object],[object Object],[object Object],[object Object]

What is the difference between a rock and a mineral? ,[object Object]

Once a rock is formed, does it stay the same rock forever? ,[object Object]

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What is the process through which rocks change? ,[object Object]

Weathering, Erosion, Compaction, Cementation Recrystallization Weathering, Erosion, Compaction, Cementation Recrystallization Melting, Solidification Melting, Solidification IGNEOUS SEDIMENTARY METAMORPHIC

How are rocks redistributed? ,[object Object]

***Watch the Rock Cycle by Brainpop ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],Igneous Rocks

ORIGIN— Where rocks are formed ,[object Object],[object Object]

Some have large & small crystals (called porphyritic)

Peridotite: Intrusive or Extrusive? Why?

Granite: Intrusive or Extrusive? Why?

Porphyry: Intrusive or Extrusive? Why?

Obsidian: Intrusive or Extrusive? Why?

COMPOSITION— What kind of substances the rocks are made of

Basaltic Igneous Rocks —made from lava/magma that is low in silica , rich in iron and magnesium. Rocks are dark- colored .

Granitic Igneous Rocks—made from magma/lava high in silica and oxygen. Rocks are light -colored.

Andesitic Igneous Rocks—have a composition between basaltic and granitic .

[object Object],Sedimentary Rocks

[object Object],[object Object],[object Object],Sedimentary Rocks

What turns sediments into solid rock? ,[object Object]

How can sedimentary layers help us understand the age of fossils? ,[object Object],[object Object]

3 Types of Sedimentary Rocks: ,[object Object]

[object Object],[object Object],[object Object],3 Types of Sedimentary Rocks:

[object Object],3 Types of Sedimentary Rocks: Mineral crystals are made as the shallow water that has flooded the bottom of Death Valley evaporates. Click on image for full size ( 66K JPG ) Courtesy of Martin Miller, University of Oregon

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[object Object],[object Object],[object Object],Metamorphic Rocks

What occurs in the Earth to change these rocks? ,[object Object],[object Object],[object Object]

How are metamorphic rocks classified? ,[object Object],[object Object]

Where do metamorphic rocks usually form? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Rocks

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Rocks