Compare radiometric dating relative dating

09-Feb-2017 22:15 by 3 Comments

Compare radiometric dating relative dating

Unlike people, you can’t really guess the age of a rock from looking at it.

Geologists draw on it and other basic principles ( to determine the relative ages of rocks or features such as faults.Here is an easy-to understand analogy for your students: relative age dating is like saying that your grandfather is older than you.Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.Absolute dating is used to determine a precise age of a fossil by using radiometric dating to measure the decay of isotopes, either within the fossil or more often the rocks associated with it.The majority of the time fossils are dated using relative dating techniques.The narrower a range of time that an animal lived, the better it is as an index of a specific time.

No bones about it, fossils are important age markers.

What’s more, if the whole rock is badly weathered, it will be hard to find an intact mineral grain containing radioactive isotopes.

You might have noticed that many of the oldest age dates come from a mineral called zircon.

There are two main methods determining a fossils age, relative dating and absolute dating.

Relative dating is used to determine a fossils approximate age by comparing it to similar rocks and fossils of known ages.

Relative age dating also means paying attention to crosscutting relationships.