Geochemist Mark Schmitz is one of four editors on The
Geologic Time Scale 2012, or GTS2012, a 1,144-page compilation of the latest
understanding of Earth’s history, and the means by which geoscientists around
the world investigate the rock record. In addition, the Isotope Geology
Laboratory at Boise State directly produced 47 of the 260 radiometric ages used
in the GTS2012, more than any other geochronology lab in the world, as part of
the lab’s comprehensive studies of the Late Paleozoic era of Earth history.