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Chapter 8 Section 1 Page 190 #’s 1-6

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Presentation on theme: "Chapter 8 Section 1 Page 190 #’s 1-6"— Presentation transcript:

1 Chapter 8 Section 1 Page 190 #’s 1-6
Determining Relative Age

2 1. Explain why it is important for scientists to be able to determine the relative age of rocks.
So they can understand the age and history of Earth

3 2. State the principle of uniformitarianism in your own words.
It’s like what happened in the past is just like what is happening now man.

4 3. Explain how the law of superposition can be used to determine the relative age of sedimentary rock. According to the law, a rock layer is always younger than the rock layer below it if the layers are undisturbed.

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6 4. Explain the difference between an unconformity and a nonconformity. .
An unconformity is a break in the rock record; a nonconformity is a kind of unconformity in which metamorphic or igneous rock layers are overlain by sedimentary rock layers.

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8 5. Compare an angular unconformity with a disconformity.
In an angular unconformity, tilted rock layers are overlain by horizontal rock layer. In a disconformity, the rock layers above and below the unconformity are parallel.

9 6. Describe how the law of crosscutting relationships helps scientists determine the relative age of rocks. The law of crosscutting relationships helps scientists understand that a body of rock or fault is always younger than any other body of rock that it cuts through.

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17 The End !!!


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