Methods for finding the age of fossils at death

In summary, the age of a human fossil can be determined by examining various factors such as bone growth, tooth development and wear, and fusion of cranial bones. Other factors such as dimensions of major bones and pelvic structure can also provide rough estimates of age. However, it is not an exact science and relies on comparing with living humans and some knowledge of diet.
  • #1
Lyuokdea
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I'm curious in the processes used to date the age of a human fossil, not in terms of how many thousands of years ago the human died, but the age of the human when they died. Are there any special processes that are used to determine this, or are humans mearly matched up in terms of degeneration with humans that are alive today?

~Lyuokdea
 
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  • #2
Some things looked at are the bones to determine if there is still growth or if it has stopped, teeth are examined to see which teeth have come in and the amount of wear. They can tell from the bones if the person has suffered from illnesses usually associated with old age, but it's not exact.
 
  • #3
Teeth of children are different than teeth of adults, so that is one factor, and as Evo mentioned, the condition of the teeth and some knowledge of diet.

Fusion of the cranial bones also give some idea of the age of an infant or young child.

Beyond that there are the dimensions of the major bones of the extremeties and vertebrae, and pelvic structure that would give rough estimates.
 
  • #4
Lyuokdea said:
I'm curious in the processes used to date the age of a human fossil, not in terms of how many thousands of years ago the human died, but the age of the human when they died. Are there any special processes that are used to determine this, or are humans mearly matched up in terms of degeneration with humans that are alive today?
~Lyuokdea
See this paper on science of Paleoneurology:
http://www.emilianobruner.it/pdf/Paleoneuro03.pdf
 
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1. How do scientists determine the age of fossils?

Scientists use a variety of methods to determine the age of fossils, including radiometric dating, stratigraphy, and paleomagnetism. These methods involve analyzing the properties of the fossil and the surrounding rock layers to determine the age.

2. What is radiometric dating?

Radiometric dating is a method that uses the natural decay of radioactive elements to determine the age of a fossil. Scientists can measure the ratio of the original radioactive element to its decay product to calculate the age of the fossil.

3. How does stratigraphy help in determining the age of fossils?

Stratigraphy involves studying the layers of sedimentary rock where the fossil is found. By analyzing the position of the fossil within the layers, scientists can determine the relative age of the fossil compared to the surrounding rocks.

4. What is paleomagnetism and how is it used to determine the age of fossils?

Paleomagnetism is the study of the Earth's magnetic field in the past. Fossils and rocks can retain information about the Earth's magnetic field at the time they were formed. By analyzing the magnetic properties of the fossil, scientists can determine its age.

5. Are there any limitations to these methods for determining the age of fossils?

Yes, there are limitations to each method and they may not always provide an exact age. For example, radiometric dating can be affected by contamination or incomplete decay, while stratigraphy may not be possible if the layers of rock have been disturbed. Scientists often use multiple methods and compare results to get a more accurate estimation of a fossil's age.

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