Beryllium 10 cosmogenic dating
Cosmogenic production at the earth's surface Si and mu-meson capture.
The rate of this production is dependent on cosmic-ray flux, which increases with latitude and elevation.
Our findings will help define the timing of deglaciation in the center of Earth’s largest continent and understand its relationship with increased CO: Our work in the Potanin Glacier Valley took place in three main locations – the Last Glacial Maximum moraine complex, Holy Mountain, a molded bedrock hill in the center of the valley, and Little Ice Age moraines. As erratics are transported in the ice, erosion removes the outer layer of the rocks, essentially eliminating the accumulated Be and resetting the clock that measures how long it’s been exposed to cosmic rays. In addition, the boulders should be shielded only minimally.Because quartz does not absorb radionuclides from precipitation, the "exposure age," or the length of time present at the surface of the earth may be effectively determined by Be produced in the upper atmosphere from that produced in situ through interaction with rocks and soils.