Terrestrial cosmogenic nuclide dating

The concentration of TCNs increases with time in an exposed surface. The rate of production for a particular TCN depends on latitude and altitude.

Recently, global positioning systems have been used to determine short-term (years-decades) rates of surface displacement.In contrast, erosion rates based on older strath terraces likely reflect long-term erosion that is generally keeping in place with the rate of bedrock uplift.Concentrations of TCNs boulders or tors (isolated bedrock knobs) on mountain summits can be used to define rates of summit erosion (Fig. Sampling can be problematic, but where samples have been collected such as in Zanskar and Ladakh in Northern India they show that erosion of summits are surprisingly little, with almost zero rates of erosion in some instances.Continent: Asia Country: Pakistan, India, Nepal and China State/Province: N/A City/Town: N/A UTM coordinates and datum: none Climate Setting: Tropical Tectonic setting: Continental Collision Margin Type: Process Figure 1.View of strath terrace along the Chandra River in the Lahul Himalaya of Northern India.

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