Geol 101 Ch 7

Geol 101 Ch 7 - Geol 101 Chapter 7 Key Terms How Do You...

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Geol 101 Chapter 7 Key Terms 25/09/2007 10:41:00 How Do You Determine the Order of Events? (7.1) Relative Age o Ordering of objects or features from oldest to youngest to help  determine the age o This process establishes the age of one things as older or younger  than another Absolute Age o Establishing the date of an event provides How Are Geologic Events Placed in Relative Order? (7.2) Principle of Superposition o Within a sequence of rock layers formed at Earth’s surface, those  lower in the sequence are older than those found above Principle of Original Horizontality o Sediment tends to be deposited in horizontal layers Principle of Cross-Cutting Relationships o Geologic Features that cut across rocks most form after the rocks that  they cut through Faults o Fractures where rocks are displaced as a result of tectonic forces Principle of Inclusions
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Geol 101 Ch 7 - Geol 101 Chapter 7 Key Terms How Do You...

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