Vintage Data (IMAGE) University at Buffalo Caption University at Buffalo geology professor Greg A. Valentine holds up a Kodachrome slide showing a landscape associated with the eruption of the Silver Creek caldera supervolcano 18.8 million years ago. Valentine collected the data in the 1980s as a PhD student. Credit Credit: Douglas Levere Usage Restrictions This image may only be used with news reports discussing the research in the associated press release. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.