xxldating - Techniques used to establish relative dating

Scientists piece together a story of how one event came before or after another.

Relative dating cannot tell us the actual age of a rock; it can only tell us whether one rock is older or younger than another.

Again, this doesn't tell them exactly how old the layers are, but it does give them an idea of the ordered sequence of events that occurred over the history of that geologic formation.

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One of the biggest jobs of a geologist is establishing the absolute age, in years, of a rock or fossil.

Unlike relative dating, which only tells us the age of rock A compared to rock B, numerical dating tells us the age of rock A in x number of years.

The first method that scientists use to determine the age of rocks is relative dating.

In this method, scientists compare different layers of rock to determine an ordered sequence of events in geologic history.

If I told you that I was 30 years old, that number would be my numerical age.

If I told you I was 32 years younger than my mother, that number would be my relative age.Recently, he appeared on the evening news to talk about a new dinosaur he just discovered. Paul says he can tell from the fossils that superus awesomus lived on Earth about 175 million years ago.Paul is super awesome, so I'm going to take him at his word.In 1905, Ernest Rutherford figured out that we could use radiation to establish the ages of rocks.By studying how the mass of uranium changed with radioactive decay, Rutherford was able to determine the age of a rock containing a uranium mineral. It meant that scientists could suddenly establish the actual ages of all their rocks and fossils!Try It risk-free Learn how scientists determine the ages of rocks and fossils.

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