Volcano park

"Volcanoes are alway cone-shaped."

Some volcanoes erupt so violently from deep within the earth that instead of a cone shape of molten debris they leave a flattened mass. According to scientists Yellowstone National Park is one big supervolcano, with its heated geysers and hot springs stemming from a "magma chamber that is about 45 miles across--roughly the same dimensions as the park."*


*Bryson.