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Rocks

Rocks. Mr. Skirbst Earth Science Topic 23. Rocks. Hard substance made of one or more minerals. 3 Rock Groups. Igneous. 3 Rock Groups. Igneous “ ignis ” – Latin for fire. 3 Rock Groups. Igneous “ ignis ” – Latin for fire formed from molten material. 3 Rock Groups. Igneous

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Rocks

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  1. Rocks Mr. Skirbst Earth Science Topic 23

  2. Rocks Hard substance made of one or more minerals

  3. 3 Rock Groups • Igneous

  4. 3 Rock Groups • Igneous “ignis” – Latin for fire

  5. 3 Rock Groups • Igneous “ignis” – Latin for fire formed from molten material

  6. 3 Rock Groups • Igneous “ignis” – Latin for fire formed from molten material magma – beneath surface lava – above surface

  7. 3 Rock Groups • Igneous “ignis” – Latin for fire formed from molten material magma – beneath surface lava – above surface Ex. Basalt, obsidian, granite

  8. 3 Rock Groups 2. Sedimentary

  9. 3 Rock Groups • Sedimentary formed from deposited particles (called sediments)

  10. 3 Rock Groups • Sedimentary formed from deposited particles (called sediments) Ex. Sandstone, limestone, shale

  11. 3 Rock Groups 3. Metamorphic

  12. 3 Rock Groups 3. Metamorphic “meta”-change; “morph” -form

  13. 3 Rock Groups 3. Metamorphic “meta”-change; “morph” -form Formed from other rocks due to heat and/or pressure and/or chemistry changes

  14. 3 Rock Groups 3. Metamorphic “meta”-change; “morph” -form Formed from other rocks due to heat and/or pressure and/or chemistry changes Ex. Gneiss, marble, schist, quartzite

  15. Igneous Rocks Classified by composition and texture

  16. Igneous Rocks Composition (based on color)

  17. Igneous Rocks Composition (based on color) - Mostly light (rich in quartz)

  18. Igneous Rocks Composition (based on color) - Mostly light (rich in quartz) - Mostly dark (rich in augite)

  19. Igneous Rocks Texture (based on crystal size)

  20. Igneous Rocks Texture (based on crystal size) - Extrusive (volcanic)

  21. Igneous Rocks Texture (based on crystal size) - Extrusive (volcanic) Cool quickly – small crystals

  22. Igneous Rocks Texture (based on crystal size) - Extrusive (volcanic) Cool quickly – small crystals Ex. Basalt, obsidian, pumice)

  23. Igneous Rocks Texture (based on crystal size) - Intrusive (plutonic – named for Roman god Pluto of the underworld)

  24. Igneous Rocks Texture (based on crystal size) - Intrusive (plutonic – named for Roman god Pluto of the underworld) Cool slowly – large crystals

  25. Igneous Rocks Texture (based on crystal size) - Intrusive (plutonic – named for Roman god Pluto of the underworld) Cool slowly – large crystals Ex. Granite, pegmatite

  26. Sedimentary Rocks 3 Categories (based on origin of material)

  27. Sedimentary Rocks 1. Clastic – made of fragments

  28. Sedimentary Rocks • Clastic – made of fragments Ex. Conglomerate, sandstone, shale)

  29. Sedimentary Rocks • Clastic – made of fragments • Organic – from organics (dead plants or animals)

  30. Sedimentary Rocks • Clastic – made of fragments • Organic – from organics (dead plants or animals) Ex. Limestone, chalk, coal

  31. Sedimentary Rocks • Clastic – made of fragments • Organic – from organics 3. Chemical – from inorganic processes like evaporation

  32. Sedimentary Rocks • Clastic – made of fragments • Organic – from organics • Chemical – from inorganic Ex. Rock salt, gypsum, calcite

  33. Metamorphic Rocks

  34. Metamorphic Rocks 2 groups based on grain texture

  35. Metamorphic Rocks • Foliated (Latin for leaf)

  36. Metamorphic Rocks • Foliated (Latin for leaf) Layers thin and flat (like leaves)

  37. Metamorphic Rocks • Foliated (Latin for leaf) Layers thin and flat (like leaves) Tend to break along bands

  38. Metamorphic Rocks • Foliated (Latin for leaf) Layers thin and flat (like leaves) Tend to break along bands Ex. Schist, slate, gneiss

  39. Metamorphic Rocks • Unfoliated

  40. Metamorphic Rocks • Unfoliated Not banded

  41. Metamorphic Rocks • Unfoliated Not banded Do not break along bands

  42. Metamorphic Rocks • Unfoliated Not banded Do not break along bands Ex. Marble, quartzite

  43. Rock Cycle

  44. Rock Cycle Magma / Lava

  45. Rock Cycle cooling crystalization Magma / Lava

  46. Rock Cycle IGNEOUS ROCKS cooling crystalization Magma / Lava

  47. Rock Cycle weathering transporting IGNEOUS ROCKS cooling crystalization Magma / Lava

  48. Rock Cycle Sediments weathering transporting IGNEOUS ROCKS cooling crystalization Magma / Lava

  49. Rock Cycle lithification Sediments weathering transporting IGNEOUS ROCKS cooling crystalization Magma / Lava

  50. Rock Cycle lithification SEDIMENTARY ROCKS Sediments weathering transporting IGNEOUS ROCKS cooling crystalization Magma / Lava

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