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    Exhumed forms may complicate identification and relationships, for both epigene and etch forms have been buried, and exhumed, but in tectonically undisturbed areas, the higher surfaces are older than those preserved at lower levels. The relationship of surfaces with volcanic deposits, old shorelines, and genetically related sedimentary sequences provides sound ages, and correlation with dated duricrusts and faults is also useful.

    There are no temporal limits to relative dating, for the methods are equally applicable to the dating, say, of Proterozoic surfaces as of those of Pleistocene age.

    Chronology of rock art, ranging from Paleolithic to present times, is a key aspect of the archaeology of art and one of the most controversial.

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    In VCE Biology there a two absolute dating techniques that are of a concern these are radiometric dating and electron spin resonance.

    On the other hand, absolute dating methods are based on scientific techniques that yield a chronometric age for a phenomenon in direct or indirect physical relation to rock art ...

    Understanding relative and absolute chronology is a fundamental strand in archaeology, turning guesswork into a science.

    Carbon for example which exists as Carbon 14 decays to Nitrogen 14 every 5 730 years so it is appropriate to date fossils up to 40 000 years.

    Potassium isotopes on the other hand cause Potassium 40 to decay to Argon 40 every 1.3 billion years and are hence more appropriate for fossils that are over 500 000 years old.

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