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The top documents tagged [cenozoic era age of]
READING THE ROCK RECORD. relative time: events are in sequence, but no actual dates absolute time: identifies actual date of event
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NOTE CHECK What is the difference between relative and absolute dating? What is superposition? What era did humans first appear?
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Geologic Time Basics. Earth’s history is huge! In order to understand earth’s history, humans must think in much larger units of time than those we use
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