Cosmogenic exposure dating totally dating for disabled
There are so many other methods of dating Quaternary sediments and organic material that it is impractical to cover them all here in detail.
Uranium-series uses the decay of uranium and thorium isotopes (Th) in calcites in particular, such as stalactites and stalagmites in caves.
The exposure ages of the Indus Valley moraines are the oldest observed to date throughout the Himalayan orogen.
We observe a pattern of progressively more restricted glaciation during the last five glacial cycles, likely indicating a progressive reduction in the moisture supply necessary to sustain glaciation.
It is effective on timescales of several millions of years.
It assumes that boulders have not been buried and then re-exposed at the Earth’s surface.
The sediments can be compared to palaeo magnetostratigraphic data, and this can be used as a proxy age determination.
A possible explanation is that uplift of Himalayan ranges to the south and/or of the Karakoram Mountains to the west of the region may have effectively blocked moisture supply by the south Asian summer monsoon and mid-latitude westerlies, respectively.