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What is the use of Electronic Spin Resonance $(ESR)$ in fossil studies?
It helps to study the proteins in sedimentary fossils
It helps to revise the evolutionary period for different groups of organisms
It helps to study the enzymes present in sedimentary fossils
All of the above
Solution
Electron Spin Resonance $(ESR)$ Dating Many materials found in archeological sites are able to trap electronic charges as a result of bombardment by radioactive radiation from the surrounding sediment.
The presence of these trapped charges can be detected by Electron Spin Resonance $(ESR)$ spectroscopy.
The intensity of the $ESR$ signal is a measure of the accumulated dose and thus of the age. Tooth enamel is ubiquitous at archeological sites and is well suited for $ESR$ dating, with a precision of about $10-20\, \%$.
This method has now been used to date many sites critical to the biological and cultural evolution on modern man
