John Willet of the Jackson Geology Club lit up the meeting with a lengthy slide presentation and explanation of the history of the volcanoes of Yellowstone.  Club members were enthralled with the slides showing the fiery core of the earth and the escape route to Yellowstone.  He shared the research showing the ash history of the three major eruptions in Yellowstone (2.2 M years ago, 1.3 M and 630,000) and compared it to four other smaller eruptions we are familiar with. We always enjoy John's presentations and the members always ask many questions!