- Causal link between Columbia River Flood Basalts (16M years ago) and Mid-Miocene Climate Optimum (high temp/CO2) - date accuracy improved from 1M years down to tens of thousands - flow length from 2M years to 1M (using novel dating of micro-zircon in ash deposit between lava layers) http://advances.sciencemag.org/content/4/9/eaat8223 3 comments science