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”, published in the November 12, 2010 issue of Science Magazine. Dr. James Crowley dated zircons from the ash bed by ID-TIMS methods selected via reconnaissance LA-ICPMS analysis, obtaining an age of 56.09 ± 0.03 Ma. This result has implications for the tuning of the Paleogene time scale, which will be further explored in follow-up geochronology on multiple samples from the site.