Disclaimer: I'm no Danish teaching expert, I just happen to be an Icelander who was forced to learn Danish as my second language - and although I always got very good grades in Danish, I was never good in Danish: can't speak it, can't understand a Dane - I can maybe read it a little bit...
University of Utah geology and geophysics professor Fan-Chi Lin said the blob-shaped lower magma reservoir in Earth's lower crust is located 12 to 28 miles (20-45 km) under Yellowstone, with a volume of 11,500 cubic miles (46,000 cubic km), or 11.2 times the volume of Arizona's Grand Canyon.
This is what we call the Hartford Ash.. The last time the Yellowstone volcano had a super eruption, 640,000 years ago, it covered eastern South Dakota in 12 inches of volcanic ash. Thes white chalky substance in Dr. Jordan's hand is ash from that eruption; found 65 feet below the ground in Hartford.hat's all tied to the heart of Yellowstone, which is the underlying volcano.. On this cold winter day, the heat from these geysers meeting the cold air sends stacks of steam into the air. What you can't see, but might feel, are the earthquakes which happen here almost daily.