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Rocks

Rocks. Observe the rocks at your desk. Decide whether they are igneous, metamorphic or sedimentary. Write the # in the box next to the rock name ( you want to use pencil!!! ) Fill out the definitions for each rock type. Igneous. 15 (granite), 17 (obsidian), 19 (pumice), 21 (gabbro).

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Rocks

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  1. Rocks • Observe the rocks at your desk. • Decide whether they are igneous, metamorphic or sedimentary. • Write the # in the box next to the rock name (you want to use pencil!!!) • Fill out the definitions for each rock type.

  2. Igneous 15 (granite), 17 (obsidian), 19 (pumice), 21 (gabbro) Rock formed from the cooling and hardening (solidification) of magma or lava • Definition: • Cooling • Intrusive: Cools Earth’s surface (from magma). Cools , allowing crystals to • examples • Extrusive: Cools Earth’s surface (from lava/pyroclastics). Cools , crystals. • examples (drawing) below slowly grow large. Granite (15), gabbro (21) above quickly little or no pumice (19), obsidian (17)

  3. 15 (granite), 17 (obsidian), 19 (pumice), 21 (gabbro), 20 (andesite) Igneous • Composition: • Light colored rocks that formed from magma with a silica content. • Dark colored rocks that formed from magma with a with a silica content. Felsic: high • (granite (15), andesite (20), pumice (19), • **obsidian(17)) ** Exception to color rule (Has lots of Silica) Mafic: low (gabbro (21), basalt)

  4. 32 (coquina), 38 & 35 (sandstone), 39 (tufa) Sedimentary Rock formed from compacting and cementing sediment. • Definition: • ____________: Fragments of other rocks cemented together. • examples: • ____________: Form from chemical solutions, when chemicals precipitate out or water evaporates away. • examples: • ____________: Remains of plants and animals. • examples: Clastic 38 & 35 sandstone Chemical 39 tufa (limestone) Organic 32 Coquina (organic limestone) drawing

  5. 60 (schist), 59 (gneiss), 56 (quartzite), 50 (marble) Metamorphic • Definition: • Example: • Parent RockMetamorphic • Granite (15) >>>> Gneiss (59) • Limestone (39, 32) >>>> Marble (50) • Sandstone (38 &35) >>>> Quartzite (56) Rocks formed from heat and pressure out of other rocks. drawing

  6. sediments magma/ lava THE ROCK CYCLE

  7. The Rock Cyle • Using your book (p119) to fill in your rock cycle diagram. • Label the 3 Rock Types • Every Arrow should have a process labeling it • Draw an example of each type of rock

  8. sediments magma/ lava THE ROCK CYCLE Deposition, Burial, Compaction and Cementation Sedimentary Uplift, Weathering, Erosion Uplift, Weathering, Erosion Melting Heat and/or Pressure Uplift, Weathering, Erosion Igneous Heat and/or Pressure Metamorphic Melting Heat and/or Pressure Cooling & Hardening (solidfication) Melting

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