Unit 2 Earth Materials Lab 2-3 Igneous Rock Identification

Unit 2: Earth Materials LAB: 2-3 Igneous Rock Identification

Vocabulary:

Igneous: Produced under the conditions involving intense heat.
Intrusive: Igneous rock that forms beneath Earth’s surface.
Extrusive: Igneous rock that forms at the Earth Surface.
Felsic: Igneous rock rich in potassium feldspar and quartz and light color.
Mafic: Igneous rocks that are rich in dark Plagioclase feldspar, pyroxene and that are dark in their color.
Lava: Magma that reaches Earth surface.
Texture: The feel of a rock due to its size, shape and its arrangement of mineral crystal or sediment in a rock.
Porphyry: Igneous rock containing coarse crystals in a finer grained groundmass
Report Sheet 5 | Light | Vesicular | Extrusive | | Felsic | Pumice | 6 | Dark | Glassy | Extrusive | | Felsic | Obsidian | 7 | Light | VeryCoarse | Intrusive | | Felsic | Pegmatite | 8 | Light | Fine | Extrusive | | Felsic | Rhyolite | 9 | Dark | Fine | Extrusive | | Mafic | Basalt | 10 | Dark | Vesicular | Extrusive | | Mafic | VesicularBasalt | 11 | Light | Non-Vesicular | Intrusive | | Felsic | Pegmatite | 12 | Light | Coarse | Intrusive | | Felsic | Granite |

Sample # | Color(Light orDark) | Texture | How Formed( Extrusive OR Intrusive) | MineralsPresent | Composition(Felsic OR Mafic) | RockName | 1 | Dark | Vesicular | Extrusive | Plagioclase Feldspar | Mafic | Scoria | 2 | Light | Coarse | Intrusive | | Felsic | Granite