Definition fission track dating
in natural minerals, the use of laser ablation inductively coupled plasma mass spectrometry for measuring uranium concentration for apatite and zircon fission-track chronometry, and detrital thermochronology based on measuring Nd isotopic compositions on single apatites by laser ablation ICP-MS, to cite a few examples.
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co.
Further evidence comes from the complete agreement between radiometric dates and other dating methods such as counting tree rings or glacier ice core layers.
Please note that any compilation of Stone Age art is bound to be both selective and subject to revision as new archeological discoveries are made.
Furthermore, despite the widening range of archeological dating techniques - such as radiometric carbon dating, Uranium/Thorium and thermo-luminescence dating - not every work of art can be dated with great accuracy if the geological environment lacks important measurable elements.
Wiens has a Ph D in Physics, with a minor in Geology.
His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.