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Rocks Mr. Skirbst Earth Science Topic 23. Rocks Hard substance made of one or more minerals.

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Presentation on theme: "Rocks Mr. Skirbst Earth Science Topic 23. Rocks Hard substance made of one or more minerals."— Presentation transcript:

1 Rocks Mr. Skirbst Earth Science Topic 23

2 Rocks Hard substance made of one or more minerals

3 3 Rock Groups 1.Igneous

4 3 Rock Groups 1.Igneous “ignis” – Latin for fire

5 3 Rock Groups 1.Igneous “ignis” – Latin for fire formed from molten material

6 3 Rock Groups 1.Igneous “ignis” – Latin for fire formed from molten material magma – beneath surface lava – above surface

7 3 Rock Groups 1.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 2.Sedimentary formed from deposited particles (called sediments)

10 3 Rock Groups 2.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 1.Clastic – made of fragments Ex. Conglomerate, sandstone, shale)

29 Sedimentary Rocks 1.Clastic – made of fragments 2.Organic – from organics (dead plants or animals)

30 Sedimentary Rocks 1.Clastic – made of fragments 2.Organic – from organics (dead plants or animals) Ex. Limestone, chalk, coal

31 Sedimentary Rocks 1.Clastic – made of fragments 2.Organic – from organics 3.Chemical – from inorganic processes like evaporation

32 Sedimentary Rocks 1.Clastic – made of fragments 2.Organic – from organics 3.Chemical – from inorganic Ex. Rock salt, gypsum, calcite

33 Metamorphic Rocks

34 2 groups based on grain texture

35 Metamorphic Rocks 1.Foliated (Latin for leaf)

36 Metamorphic Rocks 1.Foliated (Latin for leaf) Layers thin and flat (like leaves)

37 Metamorphic Rocks 1.Foliated (Latin for leaf) Layers thin and flat (like leaves) Tend to break along bands

38 Metamorphic Rocks 1.Foliated (Latin for leaf) Layers thin and flat (like leaves) Tend to break along bands Ex. Schist, slate, gneiss

39 Metamorphic Rocks 2.Unfoliated

40 Metamorphic Rocks 2.Unfoliated Not banded

41 Metamorphic Rocks 2.Unfoliated Not banded Do not break along bands

42 Metamorphic Rocks 2.Unfoliated Not banded Do not break along bands Ex. Marble, quartzite

43 Rock Cycle

44 Magma / Lava

45 Rock Cycle Magma / Lava cooling crystalization

46 Rock Cycle IGNEOUS ROCKS Magma / Lava cooling crystalization

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

48 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting

49 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification

50 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS

51 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS heating / pressure chemical changes

52 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS heating / pressure chemical changes METAMORPHIC ROCKS

53 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS heating / pressure chemical changes METAMORPHIC ROCKS melting

54 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS heating / pressure chemical changes METAMORPHIC ROCKS melting

55 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS heating / pressure chemical changes METAMORPHIC ROCKS melting

56 Rock Cycle IGNEOUS ROCKS Magma / Lava Sedim ents cooling crystalization weathering transporting lithification SEDIMENTARY ROCKS heating / pressure chemical changes METAMORPHIC ROCKS melting


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