210pb sediment dating
The Pb-210 method is used to determine the accumulation rate of sediments in lakes, oceans and other water bodies.
Finally, some recommendations to use the models are proposed.
The overall result is that radium-226 is found at low and essentially unchanging levels in soils everywhere.
metal), if it is produced in soils close to the air-soil interface.
Over time the uranium-238 very slowly decays into uranium-234 (half-life = 248,000 ).
Radium-226 in the soil exhibits the same level of radioactivity as uranium-238 from which it was originally derived, because of a natural phenomenon called secular equilibrium.