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Surface exposure dating with cosmogenic nuclides

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How can we date rocks? Using cosmogenic nuclides in glacial geology Sampling strategies cosmogenic nuclide dating Difficulties in cosmogenic nuclide dating Calculating an exposure age Further Reading References Comments. Cosmogenic nuclide dating can be used to determine rates of ice-sheet thinning and recession, the ages of moraines, and the age of glacially eroded bedrock surfaces. For glaciation, the most common application of cosmogenic nuclide dating is to date the exposure age of glacially transported rocks. It tells us how long the rocks have been located at the surface, for example, on a moraine. It is an excellent way of directly dating glaciated regions.
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Surface exposure dating of moraines

Surface exposure dating with cosmogenic nuclides
Surface exposure dating with cosmogenic nuclides
Surface exposure dating with cosmogenic nuclides
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Cosmogenic nuclide - Wikipedia

Determining the geographic footprint of past climate events is a fundamental step in identifying the mechanisms that drive and propagate these changes around the globe. Glacial deposits are a particularly robust source of such data; glaciers are sensitive indicators of climate that leave records of their past fluctuations on the landscape. Given precise chronologic control, glacial deposits can be used to reconstruct past climate variability. Recent advances in cosmogenic nuclide surface-exposure dating have established past glacial fluctuations as a key climate proxy. However, uncertainties in the application of cosmogenic nuclide production-rate-scaling frameworks hinder efforts to compare past glacial fluctuations with other records of past climate conditions.
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Cosmogenic nuclide

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The Earth is constantly bombarded by galactic cosmic rays, which primarily consist of protons. This secondary cosmic ray shower is rapidly attenuated as it travels down into the atmosphere. Only a very small fraction of the secondary cosmic rays, which mostly consist of neutrons, reach the surface of the Earth. These neutrons then collide with the elements that are found in rocks and soils, such as silicon, oxygen, calcium etc.
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