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2 Rock Classification Geologists classify rocks into three major groups depending on how they are formed: igneous rock, sedimentary rock, and metamorphic.

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Presentation on theme: "2 Rock Classification Geologists classify rocks into three major groups depending on how they are formed: igneous rock, sedimentary rock, and metamorphic."— Presentation transcript:

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2 2 Rock Classification Geologists classify rocks into three major groups depending on how they are formed: igneous rock, sedimentary rock, and metamorphic rock. - Classifying Rocks

3 3 Rock Processes Review Sedimentary Metamorphic Igneous

4 4 Igneous Rock Recipe 5. Igneous Rock Serve and Enjoy 2.Place in oven (2,000 C) Add Heat Energy & Melt + Heat Minerals Quartz + Biotite + Feldspar 1. Take some Minerals & Gasses – Mix well 4. Remove from heat, let it Cool & Crystallize (Intrusive/Extrusive) 3. Change Rock to Liquid Phase (Magma)

5 5 Sedimentary Rock Recipe 4. Sedimentation & Deposition 5. Compaction & Cementation 2. Weather (Break Up) 3. Erode (Carry Away) © Beadle, 2009 Sedimentary Rock Igneous Rock 1. Start with existing rock at the Surface

6 Metamorphic Rock Recipe 1. Get some pre-formed rock – Igneous or Sedimentary will do & burry it deep underground. 2a. Add a mild amount of Heat (Not too hot) Note: Add more heat for Igneous Rock 2b. Squeeze to Foliate 3. Cool & (Re)-Crystallize 4. Metamorphic Rock Gneiss (foliated) Granite (Igneous) + HEAT + Pressure

7 Class Activity Rock Cycle Game

8 Igneous Rocks Metamorphic Rocks Melting Cooling & Hardening High Temp & Pressure Magma (Liquid Rock) Sedimentary Rocks Compaction & Cementation Sediments Weathering & Erosion To the Surface

9 Igneous Rocks Metamorphic Rocks Melting Cooling & Hardening High Temp & Pressure Magma (Liquid Rock) Sedimentary Rocks Compaction & Cementation Sediments Weathering & Erosion To the Surface

10 10 Rock Processes Review Sedimentary Metamorphic Igneous

11 Linear Process Connection Igneous Rock Take minerals & Add a lot of Heat to Melt Cool & Crystallize (Extrusive) Change to Liquid Phase (Magma) Rise to the Surface Sedimentation & Deposition Compaction & Cementation Weather (Break Up) Erode (Carry Away) Sedimentary Rock Cool & Crystallize (Intrusive) burry it deep underground Add Heat & Pressure (Not too hot) Cool & (Re)-Crystallize Metamorphic Rock

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13 What is the Rock Cycle? Metamorphic Rocks Igneous Rocks Sedimentary Rocks Any rock type can be changed into any of the other two and back again depending on conditions -The process of rocks changing from one type of rock to another

14 Hot Magma Cooler Crust pm © Beadle, 2009

15 Hot Magma Regional Metamorphism (compression) pm © Beadle, 2009

16 Rocky Cycle: Point out where metamorphism, igneous & sedimentary rocks are processed & formed. Cloud Hot Magma 1 4a b 2b pm 2a pm Earthquakes 3 Volcanic Explosion Extrusive Igneous Rock © Beadle, 2009 Metamorphism (Pressure)

17 Rock Cycle Key: Point out where metamorphism, igneous & sedimentary rocks are processed & formed. Cloud Sedimentary Extrusive Igneous Intrusive Igneous Metamorphism Intrusive Igneous Contact Metamorphism Regional Metamorphism © Beadle, 2009

18 Weathering & Erosion are actively breaking down the mountains & creating sediment Deposition: minerals from the Granite spreading out as sand & clay! This makes the soil of the valley The rock cycle is an active process that you can see just about everywhere outside: Underneath the surface, sediment is being compacted & cemented = Sedimentary The white tops of these mtn’s are granite= Igneous

19 Rise to The Surface Weather (Break Up) Erosion (Carry Away) Sedimentation & Deposition Compaction Cementation Heat & Pressure Melting Cooling & Crystallizing What Rock? What Rock? Start with some minerals The Rock Cycle

20 Mineral Series in the Rock Cycle Quartz Plag Clay (Sediment) Sand (Sediment) Sandstone (Sedimentary) Shale (Sedimentary) Granite (Igneous) Quartzite (Metamorphic) Slate (Metamorphic) Gneiss (Metamorphic) Schist (Metamorphic)

21 Class Activity Video: (Start at 15 minutes) Crayon Video DVD: Bill Nye_Rocks & Soil


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