This talk will focus on fossil, sedimentary, and chemical evidence for a massive reef-killing extinction that occurred 360 million-years-ago during the Devonian period. This evidence is contained in strata that occur in western and southwestern Colorado, and promises insights into what happens after a major ocean acidification event.

James Hagadorn is currently the Tim & Kathryn Ryan Curator of Geology at the Denver Museum of Nature & Science.  A broadly trained geologist, he enjoys exploring deep time and using knowledge gained from the past to inform our future.