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Posts dealing with news and events in the Isotope Geology Lab

IGL News

Publication of The Geological Time Scale 2012

IGL Director 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. … (Read More) Publication of The Geological Time Scale 2012

Geochronology of the PETM included in recent Science article

A new age for a volcanic ash bed in a terrestrial section containing the Paleocene-Eocene Thermal Maximum was reported in a recent article by Carlos Jaramillo and coworkers, “Effects of Rapid Global Warming at the Paleocene-Eocene Boundary on Neotropical Vegetation”, … (Read More) Geochronology of the PETM included in recent Science article

New age constraints on Western Gondwanan glaciation

New U-Pb zircon geochronology from the Isotope Geology Laboratory has established an unprecedented chronology of Late Paleozoic glacial deposits in western Gondwanan Paganzo and Rio Blanco basins (Argentina). Lead author Erik Gulbranson, a Ph.D. student at the University of California … (Read More) New age constraints on Western Gondwanan glaciation

Milankovitch orbital forcing of climate in the Late Paleozoic Ice Age

Dr. Vladimir Davydov, Dr. James Crowley, and Dr. Mark Schmitz report the results of new geochronology in Pennsylvanian cyclothem deposits of the Donets basin (Ukraine) in an article recently published in Geochemistry Geophysics Geosystems, the electronic journal of the American … (Read More) Milankovitch orbital forcing of climate in the Late Paleozoic Ice Age

New constraints on Snowball Earth glaciation reported in Science

Dr. Francis Macdonald, Dr. Mark Schmitz and Dr. James Crowley are co-authors on a research paper published March 5 in Science, the academic journal of the American Association for the Advancement of Science. Called “Calibrating the Cryogenian,” the article’s underlying … (Read More) New constraints on Snowball Earth glaciation reported in Science