Http:// v=wv4M4wror58. ROCK Composed of one or more minerals Classified by 1.Origin – how they...

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Transcript of Http:// v=wv4M4wror58. ROCK Composed of one or more minerals Classified by 1.Origin – how they...

Page 2: Http:// v=wv4M4wror58. ROCK Composed of one or more minerals Classified by 1.Origin – how they were formed 2.Mineral Content 3.Texture.

ROCK

Composed of one or more minerals

Classified by

1. Origin – how they were formed

2. Mineral Content

3. Texture

Page 3: Http:// v=wv4M4wror58. ROCK Composed of one or more minerals Classified by 1.Origin – how they were formed 2.Mineral Content 3.Texture.

ROCK

Composed of one or more minerals

Classified by

1. Origin – how they were formed

2. Mineral Content

3. Texture

Page 4: Http:// v=wv4M4wror58. ROCK Composed of one or more minerals Classified by 1.Origin – how they were formed 2.Mineral Content 3.Texture.

IGNEOUS ROCKS

ESRT Page 6http://www.youtube.com/watch?v=aCnAF1Opt8M

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Formation

• Solidification of magma• Made up of inter grown mineral crystals

• Environments a. Magma – below ground b. Lava – above ground

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a. Texture

Determined by the rate of cooling, refers to the size, shape and arrangement of crystals which grew out of the cooling magma/lava

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1. Intrusive

• You can visibly see the ____________

• cooled slowly, deep beneath the Earth’s surface

• large to medium crystals

Mineral crystals

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Pegmatite – Very Coarse Texture

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Granite - Coarse Texture

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2. Extrusive• Very small or no _______________

• cooled quickly on earth’s surface

• glassy to fine (can see with a hand lens) crystals

Mineral crystals

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3. Porphyritic

• Contains crystals of two markedly different sizes

• identify with the majority of crystals

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4. Vesicular

• Porous from trapped gas pockets

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b. Color

Based on the mineral content or what it is made of

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Mafic

Dark colored, high in Iron (Fe) and Magnesium (Mg), more dense

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Felsic

• Light colored, high in Aluminum (Al) and Silicon (Si), less dense

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Page 19: Http:// v=wv4M4wror58. ROCK Composed of one or more minerals Classified by 1.Origin – how they were formed 2.Mineral Content 3.Texture.
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HOW DO YOU KNOW ITS AN IGNEOUS ROCK

1.Mineral Crystals or

2.Vesicular – Gas pockets

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Order in which minerals crystallize from a cooling magma/lava to form igneous rocks

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