Rocks Combinations of different minerals Granite is a mixture of: Feldspar Quartz Mica Hornblende.
Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain...
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Transcript of Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain...
![Page 1: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/1.jpg)
Classifying Rocks
Classifying Rocks
![Page 2: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/2.jpg)
• Are made of mixtures of minerals and other materials, although some may contain only a single mineral.– Granite• Quartz• Feldspar,• Mica• Hornblend
Rocks
![Page 3: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/3.jpg)
• Size, shape and pattern of rock grains.– Grains- particles of minerals or other rocks.
Texture
![Page 4: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/4.jpg)
• Coarse Grained- Large and easy to see.
• Fine Grained- small.
Texture (Grain Size)
![Page 5: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/5.jpg)
• Grains vary widely.– Tiny particles of sand.– Look like seeds– Crystals– Smooth / rounded– Jagged
Texture (Grain Shape)
![Page 6: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/6.jpg)
• Grains often form patterns.
– Some lie in flat layers.
– Rows of grains.
– Random grains.
Texture (Grain Pattern)
![Page 7: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/7.jpg)
• Have no grain.– They cool very quickly
when they form, gives the rock a smooth, shiny texture like thick glass. (obsidian)
– Or made out of extremely small particles of silica that settle out of water. (flint)
Texture (No Visible Grain)
![Page 8: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/8.jpg)
• 3 Groups- refers to how the rocks formed.
Origin
![Page 9: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/9.jpg)
• Use a microscope to look at the size & shape of crystals to ID (identify) minerals in the rock.
• Acid test- tests for carbonates.
• Magnetic Test- tests for iron and nickel.
Mineral Composition
![Page 10: Classifying Rocks. Are made of mixtures of minerals and other materials, although some may contain only a single mineral. – Granite Quartz Feldspar, Mica.](https://reader035.fdocuments.us/reader035/viewer/2022070410/56649f1d5503460f94c33e75/html5/thumbnails/10.jpg)
Rock Cycle