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In rock and other materials of similar density, most of the cosmic ray flux is absorbed within the first meter of exposed material in reactions that produce new isotopes called cosmogenic nuclides.

At Earth's surface most of these nuclides are produced by neutron spallation.

In particular, the impact of current environmental change on the nature of Earth Surface Processes is hardly predictable.

Surface exposure dating is a collection of geochronological techniques for estimating the length of time that a rock has been exposed at or near Earth's surface.There are both radioactive and stable cosmogenic isotopes.Some of these radioisotopes are tritium, carbon-14 and phosphorus-32.The LDEO Cosmogenic Nuclide Group develops terrestrial cosmogenic nuclide techniques and applies those as chronometers and tracers in the Earth Sciences.Terrestrial cosmogenic nuclides are produced by interactions between secondary cosmic rays and near surface rocks.

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Our research interests cover a wide spectrum of earth scientific disciplines and include timing of ice ages, subglacial erosion rates, uplift rates of Pleistocene terraces, and a better understanding of the production systematics of cosmogenic nuclides.

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