As fallout { { } 137 Cs } with a short half life of 30 ^17 a in modern lake deposits, depth distribution shapes of cosmogenic radionuclide 10 Be with a long half of 1.

As we reported early~(\),there are very close relationships between ~(10)Be concentration,chemical composition,and grain size of the wind blown dust sediments of Chinese loess,paleosol,and red clay,implying that these relationships could be employed to estimate the ~(10)Be concentration at dust deposition or soil formation.

Meteorites were irradiated by cosmic rays after being ejected from their parent asteroids until falling on the Earth,producing various radionuclides,including 10Be and 26Al.