Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary period for different groups of organisms, includes

Question

Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary period for different groups of organisms, includes (A) study of carbohydrates/proteins in fossils (B) study of the conditions of fossilization (C) Electron Spin Resonance (ESR) and fossil DNA (D) study of carbohydrates/proteins in rocks

Tardigrade Admin · Accepted Answer

Electron Spin Resonance (ESR) measures number of charges occupying deep traps in crystal band gap. The basic principle of ESR is same as those for luminescence ie, electrons become trapped and stored as a result of ionising radiations eg, dating of tooth enamel.

Q. Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary period for different groups of organisms, includes

study of carbohydrates/proteins in fossils

study of the conditions of fossilization

Electron Spin Resonance (ESR) and fossil DNA

study of carbohydrates/proteins in rocks

Electron Spin Resonance $(ESR)$ measures number of charges occupying deep traps in crystal band gap. The basic principle of $ESR$ is same as those for luminescence ie, electrons become trapped and stored as a result of ionising radiations eg, dating of tooth enamel.