Cosmogenic isotope exposure dating

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Dr David Roberts. Preece, and M. Raised beaches at Turakerai Head that were dated by surface exposure dating. Leave a Reply Cancel reply Your email address will not be published. Bentley, S. These nuclides are particularly useful to geologists because they are produced when cosmic rays strike oxygen and siliconrespectively.

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Surface exposure dating

About Us. This is quite an involved process and means using some quite dangerous chemicals, such as HF Hydrogen Flouride. We can use cosmogenic nuclide dating to work out how thick ice sheets were in the past and to reconstruct rates of thinning. Granite and sandstone boulders are frequently used in cosmogenic nuclide dating, as they have large amounts of quartz, which yields Beryllium, a cosmogenic nuclide ideal for dating glacial fluctuations over Quaternary timescales. Once exposed to the atmosphere, the boulder will begin to accumulate cosmogenic nuclides. Each of these nuclides is produced at a different rate.

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