What did Yellowstone look like before it erupted?
What did Yellowstone look like before it erupted? So, what did Yellowstone look like before the hot spot arrived? Huge volcanic mountains could be found along the eastern and northern borders, with sedimentary rocks filling in between and stretching into southeastern Idaho.
What happens if Yellowstone blows up tomorrow?
If another large, caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Such a giant eruption would have regional effects such as falling ash and short-term (years to decades) changes to global climate.