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Dating Rocks and Fossils Using Geologic Methods

Relative age in dating data validation and verification Dinosaurs disappeared about 65 million years ago. That corn cob found in relative age in dating ancient Native American fire pit is 1,000 years old. How do scientists actually know these ages? Geologic age dating—assigning an age to materials—is an entire discipline of its own. The method of reading the order is called stratigraphy layers of rock are called strata. Relative dating does not provide actual numerical dates for the rocks. Next time you find a cliff or road cutting with lots of rock strata, try working out the age order using some simple principles. Sedimentary rocks are normally laid down in order, one on top of another. In a sequence, the oldest is at the bottom, the youngest is at the top.

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