Absolute and relative dating of fossils

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An absolute age is one determined usually by mass-spectrometry where an isotope is measured and then an age can be calculated a very very basic explanation. So in the end you can say this fossil is 50 thousand years old always with an associated uncertainty. We can absolute date materials but it will always have an uncertainty range, we can never know the age with infinite precision. Relative dating is like looking at a multi-layered cake. The base layer must come first, then the second and then the third.
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Relative Vs. Absolute Dating: The Ultimate Face-off

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Difference Between Relative and Absolute Dating - scraptitude.com

Relative dating and radiometric dating are used to determine age of fossils and geologic features, but with different methods. Relative dating uses observation of location within rock layers, while radiometric dating uses data from the decay of radioactive substances within an object. Relative dating observes the placement of fossils and rock in layers known as strata. Basically, fossils and rock found in lower strata are older than those found in higher strata because lower objects must have been deposited first, while higher objects were deposited last. Relative dating helps determine what came first and what followed, but doesn't help determine actual age. Radiometric dating, or numeric dating, determines an actual or approximate age of an object by studying the rate of decay of radioactive isotopes, such as uranium, potassium, rubidium and carbon within that object. Radioactive isotopes decay at a fixed rate.
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Dating Fossils – How Are Fossils Dated?

Relative fossil dating is different from absolute dating, in one important way: Absolute dating gives you a number for example, carbon dating a fossil to 50 million years ago. Relative dating puts the fossil in contextwhat lived before it, and what lived after. Relative dating relates fossils to events.
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Geologists often need to know the age of material that they find. They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years. This is different to relative dating, which only puts geological events in time order. Most absolute dates for rocks are obtained with radiometric methods.
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