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Dating techniques for fossils

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Can we determine the age of the earth, and if so, how? Scientists generally agree that the answer to the riddle of the age of the earth is carefully concealed within the earth's crust. Thus, the geologic timescale and radiometric dating have been developed in an effort to determine the age of the earth. The older of the two dating methods, the geologic timescale, is actually a circular argument and is therefore considered by many scholars to be weak.
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Fossils: What They Are, How They Form, How They Survive

Dating techniques for fossils
Dating techniques for fossils
Dating techniques for fossils
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Radiometric Age Dating - Geology (U.S. National Park Service)

The Age of Dinosaurs was so many millions of years ago that it is very difficult to date exactly. Scientists use two kinds of dating techniques to work out the age of rocks and fossils. The first method is called relative dating. This considers the positions of the different rocks in sequence in relation to each other and the different types of fossil that are found in them. The second method is called absolute dating and is done by analysing the amount of radioactive decay in the minerals of the rocks.
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Radiometric Age Dating

Comparison of commonly used dating techniques. Radiation, which is a byproduct of radioactive decay, causes electrons to dislodge from their normal position in atoms and become trapped in rocks in the crystal structure of the material. Dating methods like thermoluminescence , sedimentary stimulating luminescence and electron spin resonance , measure the accumulation of electrons in these imperfections, or "traps," in the crystal structure of the material.
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Lake Turkana has a geologic history that favored the preservation of fossils. Scientists suggest that the lake as it appears today has only been around for the past , years. The current environment around Lake Turkana is very dry. Over the course of time, though, the area has seen many changes. Over time the sediment solidified into rock.
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