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10 Cards in this Set
- Front
- Back
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Orignal Horizontality
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rocks are desposed in horizontal layers
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Principle of Super Position
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in an understood rock sequence - rocks will remain in horizontal layers
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Cross-cutting Relationships
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an intrusion or fault is younger than the layers it cuts across
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fault
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fracture along which movement takes place
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unconformity
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eroded layers have new layers put down on top of them, "a gap in the rock record"
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What does ABSOLUTE DATING do?
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determines the *actual age of an object
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How does Absolute Dating work?
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certain isotopes decay into other elements, by that we can determine the age
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What are radioactive isotopes?
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the isotopes that decay into other elements are called absolute elements
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What are the two types of Radio Active Isotopes?
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Parent and Daughter
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what is a Parent Isotope?
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Radio Active Isotope of an element
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