Elemental analysis via the emission of X-rays from material bombarded with high-energy X-rays or gamma rays, and date from the characteristic radiation of the material is measured
Elemental analysis via the emission of X-rays from material bombarded with high-energy X-rays or gamma rays, and date from the characteristic radiation of the material is measured
A heavy, inert gaseous element. Symbol, Xe
A fragment of older rocks formed in a larger mass of newer rock