![Page 1: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/1.jpg)
Igneous Rocks
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Rock climbers
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El Capitan
![Page 4: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/4.jpg)
Yosemite map
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Rock types
• Igneous rock• Sedimentary rock • Metamorphic rock• Melting—Magma
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The rock cycle
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Rock cycle "shortcuts" or interruptions
• Sedimentary rock melts • Igneous rock is metamorphosed • Sedimentary rock is weathered • Metamorphic rock weathers
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Basaltic lava splash
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basalt
![Page 10: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/10.jpg)
Rhyolite: Fine-grained igneous texture
![Page 11: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/11.jpg)
Scoria: basalt
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Coarse-grained igneous texture
![Page 13: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/13.jpg)
Porphyritic igneous texture
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Porphyritic Andesite
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Porphyritic granite
• http://www.soc.soton.ac.uk/soes/resources/collection/minerals/igne-1/pages/ig10.htm
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Obsidian exhibits a glassy texture
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pumice
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Classification of igneous rocks
![Page 19: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/19.jpg)
Magma types
• Felsic—high silica• Mafic—only about half silica• Intermediate—by mixing of those two• Ultramafic—from mantle melting
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Magma components
• http://volcanoes.usgs.gov/Products/Pglossary/VolRocks.html
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Granite
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rhyolite
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Classification of igneous rocks
![Page 24: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/24.jpg)
basalt
![Page 25: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/25.jpg)
gabbro
![Page 26: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/26.jpg)
Classification of igneous rocks
![Page 27: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/27.jpg)
andesite
![Page 28: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/28.jpg)
Hornblende phenocrysts in
andesite
• http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousCompositions/5Andesite.html
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Porphyritic Andesite
![Page 30: Igneous Rocks - Find PeopleWhen magma or lava cools and solidifies, igneous rock forms. Igneous Weathering breaks down rock that is transported and deposited as sediment. Sediment](https://reader035.vdocuments.us/reader035/viewer/2022070217/61211c0a77aa9f46327c7e50/html5/thumbnails/30.jpg)
Porphyritic andesite
• http://www.pitt.edu/~cejones/GeoImages/2IgneousRocks/IgneousCompositions/5Andesite.html
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diorite
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Bowen’s Reaction Series
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Halite/Sylvite mine
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Bingham Copper Mine