Geochronology
Geochronology
GChron
Articles | Volume 8, issue 3
Articles | Volume 8, issue 3
https://doi.org/10.5194/gchron-8-547-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-8-547-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 8, issue 3
Research article
 | 
15 Sep 2026
Research article |  | 15 Sep 2026

Meteoric beryllium-10 fluxes from soil inventory measurements in the East River watershed, Colorado, USA

José M. Marmolejo-Cossío, Isaac J. Larsen, Eyal Marder, and Alan J. Hidy

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Short summary
Collision of cosmic rays with the atmosphere produces rare atoms, including beryllium-10, which falls out in precipitation and binds to soils. Measurements on glacial deposits from the last ice age in Colorado, USA show that millions of beryllium-10 atoms fall on each square centimeter of land each year. The rate of delivery increases with elevation and precipitation, which allowed us to make maps of the beryllium-10 flux for an entire watershed that will be used to measure erosion rates.
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