Surface exposure dating with cosmogenic nuclides


25-Mar-2020 23:33

surface exposure dating with cosmogenic nuclides-67

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One of the largest errors in cosmogenic nuclide dating comes from a poor sampling strategy.

Because cosmic rays only penetrate the upper few centimetres of a rock, movement of a boulder downslope can result in large errors in the age calculated.

Accounting for variable production rates Bethan Davies cosmogenic nuclide sampling a sandstone boulder on a moraine.

Ian Hey Cosmogenic nuclide production rates vary according to latitude and elevation.

These factors must be measured by the scientist, and are accounted for in the calculation of the exposure age.

Sampling strategies cosmogenic nuclide dating Sampling strategy is the most important factor in generating a reliable exposure age.For a rock to be suitable for cosmogenic nuclide dating, quartz must occur in the rock in sufficient quantities and in the sufficient size fraction.



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