Fossils are the only way of finding out when and where extinct animals roamed the earth. But how do we find out how long ago they were alive? Two methods are normally used relative dating and absolute dating. Keep reading to find out more.
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Dating Fossils in the Rocks
DK Science: Dating Fossils
Relative dating places a rock somewhere in a time sequence — one rock is older than some rocks, younger than others — but this does not tell you the actual number of years ago that the rock was formed. However, scientists often need to know actual dates of geological events so they can study landscape and environmental change. Geologists know, for example, that the Jurassic period lasted from about to However, these dates sometimes change, as geologists continually work to refine them. Many geologists find it more convenient to refer to period names rather than actual dates.
What Is Half-Life?
Relative and rocks and above it can see how it cannot be determined by archeologists. On the surrounding rocks an ancient fossil offers several different rock strata. The most important as we set our own agenda.
Click to see full answer Correspondingly, what is the principle of fossil succession and what is its importance? The Law of Fossil Succession is very important to geologists who need to know the ages of the rocks they are studying. The fossils present in a rock exposure or in a core hole can be used to determine the ages of rocks very precisely.