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Rocking with rocks!

Table of Contents #7. Rocking with rocks!. What are igneous, sedimentary, and metamorphic rocks and which picture is a representation of that rock type. C. A. B. Igneous - think of the word “ignites” Formed from solidified molten rocks Metamorphic – Think of the word “magma”

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Rocking with rocks!

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  1. Table of Contents #7 Rocking with rocks!

  2. What are igneous, sedimentary, and metamorphic rocks and which picture is a representation of that rock type. C A B

  3. Igneous - • think of the word “ignites” • Formed from solidified molten rocks • Metamorphic – • Think of the word “magma” • Formed when other rocks are changed by heat, pressure, and chemical reactions within the Earth • Sedimentary - • Formed when combinations of rock fragments, seashells, and chemicals are composed in layers and hardens Types of rock

  4. Out of the three types of rocks, which one do you think will have fossils? Explain which rock type you chose and why the others wouldn’t have any. Something to think about…

  5. The Earth’s Story Uniformitarianism • Theory: Geologic change is gradual • Scientist: Hutton • To help me remember: think of uniform Catasrophism • Theory: Geologic change is sudden • Scientist: Lyell • To help me remember: Think of catastrophe (disaster)

  6. Modern geology (current theory): Gradual geologic change is interrupted by catastrophes To study geologic change involves studying past life. Using fossils to study past life is called paleontology. Current theory

  7. Relative Dating: what scientist use to determine whether an event or object is older or younger than another event or object Relative Dating is just an ESTIMATE of events… There is no absolute information Relative dating

  8. The Law of Superposition states: Younger rock lies above older rock in an undisturbed sequence. Law of Superposition

  9. Geologic column is an arrangement of rock layers in which the older rocks are at the bottom Geologic columns help scientist find the relative age of the Earth. Geologic Column

  10. Features: • Faults – break in the Earth’s crust, where blocks of crust shift past one another So what about disturbed rock?

  11. Intrusion – Igneous rock (molted rock) from the Earth’s interior that squeezes into existing rock and cools (younger then sedimentary layers) Features

  12. Folding – Occurs when rock layers bend and buckle from Earth’s internal forces Events

  13. Tilting -occurs when Earth’s forces move rock layers until they become slanted. Events

  14. Any feature that cuts across a body of sediment or rock is younger than the body of sediment or rock that it cuts Cross cutting law

  15. LIST THE LAYERS FROM YOUNGEST TO OLDEST B G E A D F C

  16. LIST THE LAYERS FROM YOUNGEST TO OLDEST

  17. Recap: Is the rock in this picture disturbed? If so, explain how.

  18. How about now?

  19. Last one…

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