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14 Cards in this Set
- Front
- Back
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What is a rock? |
A mixture of minerals |
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What are the 4 main minerals in granite? |
•mica •quartz •feldspar •hornblende |
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Balsaltic |
Dark and dense igneous rocks |
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What is the rock cycle?? |
Shows how rocks change from one family to another trough forces and processes |
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Rock cycle processes |
Weathering Pressure,heat Melting |
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Major rock families |
•igneous- first rock family, granite, basalt •sedimentary-made up of chunks of other rocks(sandstone,limestone) •metamorphic-rocks that used to be part of another family(marble) |
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What are igneous rocks? |
Formed from lava or magma(volcanic) •formations include batholiths and laccoliths |
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Intrusive rocks |
Found underground in the magma •usually slow cooled/well formed crystals |
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Extrusive rocks |
Found in the atmosphere and formed from lava •fast cooled and can't see grains |
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Igneous rocks can also be classified as basaltic. What is basaltic? |
Low in silica, darker, more dense |
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Granitic |
High in silica, light colored, less dense |
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Andesitic |
Granitic and basaltic mused together |
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Examples of instructive rocks |
Gabbro Diorite Granite |
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Example of extrusive rocks |
Pumice Obsidian Scoria(lava rock) |
