Extreme heat from thermal features at Yellowstone National Park , created by the active volcano below the park , caused oil to bubble on a road surface on July 9 and damage it . It sits on top of one of the world 's largest mountains . Extreme heat from the volcano 's thermal areas damaged the popular road . No volcanic eruption is recorded for 1,000 years or more .
It sits on top of one of the world 's largest mountains . Extreme heat from the volcano 's thermal areas damaged the popular road . No volcanic eruption is recorded for 1,000 years or more .