yellowstone caldera blast zone Archives - TravelsFinders.Com ® http://travelsfinders.com/tag/yellowstone-caldera-blast-zone Fri, 17 Jun 2016 14:11:00 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.4 What Is the Yellowstone Caldera? http://travelsfinders.com/what-is-the-yellowstone-caldera.html http://travelsfinders.com/what-is-the-yellowstone-caldera.html#respond Sat, 18 Jun 2016 11:42:00 +0000 http://travelsfinders.com/?p=206805 The road approaching Madison Junction from the west enters one of the major geological features of Yellowstone Park, the caldera, or huge crater, that formed 640,000 years ago. At that time, a vast volcanic explosion occurred, which blew out at least 1000 times as much rock as the Mount St. Helens eruption in Washington State did in 1980. The molten rock from a huge underground chamber was blown high into the air and then settled as volcanic ash (now called the Lava Creek tuff). The chamber extended from here east beyond the present-day Canyon Village and Fishing Bridge Junction areas

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