Clue 1 - Igneous rocks - Station 5     How to use the classification chart
Wednesday, May 09, 2012
8:38 AM
Station 5:  How to use the igneous rock classification chart to name your rock

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Definition of a rock
A rock is a collection of minerals or smaller rocks that are naturally attached to each other and form a solid.
Note - A rock may be composed of glass rather than mineral matter.
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Classification chart
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Photos of igneous rocks
Skill:  Classifying objects by recognizable names.
Classify means to ...
What is the texture of your rock?
What does the texture tell you about conditions where it formed?
Fine-grained 
Aphanitic
Coarse-grained 
No minerals
Glassy
Name of mineral:
Percentage of that mineral
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