2006-06-11 10:54:01 · 6 answers · asked by Evan J 1 in Science & Mathematics ➔ Geography
Long before any recorded human history in Yellowstone, a massive volcanic eruption spewed an immense volume of ash that covered all of the western U.S., much of the Midwest, northern Mexico and some areas of the eastern Pacific Coast. The eruption dwarfed that of Mount St. Helens in 1980 and left a huge caldera 43 miles by 18 miles (70 km by 30 km) sitting over a huge magma chamber (see Geology section and Yellowstone Caldera). Yellowstone has registered three major eruption events in the last 2.2 million years with the last event occurring 640,000 years ago. Its eruptions are the largest known to have occurred on Earth within that timeframe, producing drastic climate change in the aftermath
2006-06-11 11:15:38 · answer #1 · answered by organicchem 5 · 0⤊ 0⤋
It's erupted at least three times, on average every 600,000 years. The last eruption was, you guessed it, about 600,000 years ago.
2006-06-13 23:14:27 · answer #2 · answered by wstephenshaw 1 · 0⤊ 0⤋
Yes, three times in fact, and we are due for another eruption about...now!
2006-06-17 03:08:02 · answer #3 · answered by Dan S 7 · 0⤊ 0⤋
maybe it been around for 4 billion years
2006-06-15 12:55:11 · answer #4 · answered by jredfearn08 4 · 0⤊ 0⤋
yes
2006-06-11 18:36:26 · answer #5 · answered by Anonymous · 0⤊ 0⤋
no but it had a avalanche once
2006-06-11 18:00:33 · answer #6 · answered by Anonymous · 0⤊ 0⤋