Rock Cycle and 3 Types of Rocks-Sedimentary, Igneous and Metamorphic YouTube Lecture Handouts
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IGENOUS ROCKS
| Ultra-felsic | Felsic (Granitic) | Intermediate | Mafic (Basaltic) | Ultramafic |
| Light colored Low in iron, magnesium, calcium, High in potassium, aluminum, sodium | Medium colored | Dark colored High in iron, magnesium, calcium Low in potassium, aluminum, sodium | Dark colored Very high in iron, magnesium | |
| Very high silica content (up to 80 %) | Silica/Oxygen:> 65 % | Silica/Oxygen: 53 % to 65 % | Silica/Oxygen: 45 % to 52 % | Silica/Oxygen:< 45 % |
| very low temperature, cools quickly | Low temperature | Medium temperature | High temperature | Very high temperature |
| Extremely sticky magma | High viscosity | Low viscosity - flow easily | ||
| Medium volatile content | Low volatile content | Very low volatile content |
| Felsic (Granitic) | Intermediate | Mafic (Basaltic) | Ultramafic | |
| Aphanitic fine grain (Fast cooling, Extrusive) | Rhyolite | Andesite | Basalt | Conditions to produce ultramafic flows do not exist in nature |
| Intermediate | Dacite | Diabase | ||
| Phaneritic coarse grain (Slow cooling, Intrusive) | Granite | Diorite | Gabbro | Peridotite |
| Glassy | Obsidian | |||
| Frothy | Pumice | Scoria |
SEDIMENTARY ROCKS
METAMORPHIC ROCKS
✍ Manishika