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LoginLog In Join. View Wish List View Cart. Middle school. High school. Adult education. Resource type. Independent work.
Geological time — 1. Absolute age dating — 3. Geological time scale — 4. Geological maps. It may surprise you to learn that geologists were able to determine much of the history of the Earth and its life without knowing anything about the actual ages of the rocks that they studied. Through use of absolute age dating techniques which were developed during the 20th century; see Section 2 , they were able to later assign dates in years before the preset to important events in Earth's history.
After layer 3 but before 5. Layer 4 cuts through , but not 5, so 5 must be newer. Law of Cross-cutting relationships.
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