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Absolute dating geology

Relative age dating also means paying attention to crosscutting relationships.

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Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.Unlike people, you can’t really guess the age of a rock from looking at it.Yet, you’ve heard the news: Earth is 4.6 billion years old. That corn cob found in an ancient Native American fire pit is 1,000 years old. Geologic age dating—assigning an age to materials—is an entire discipline of its own.The age of the fossil must be determined so it can be compared to other fossil species from the same time period.Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.Mountains, erosion, and variations in climate were considered to be punishment for the sins committed by humanity.

Buffon's Iron Sphere Experiments- On the basis of iron sphere cooling experiments, Frenchman Georges de Buffon estimated that the Earth would have needed 75,000 years to cool to its present temperature.

Using relative dating the fossil is compared to something for which an age is already known.

For example if you have a fossil trilobite and it was found in the Wheeler Formation.

The quantitative approach is admirable, but Buffon's assumptions are flawed. Silicate minerals have lower heat conductivity than steels and are better insulators leading to slower cooling rates.

Second, the calculations did not incorporate the heating effects of radioactive decay.

A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.