Is that still active or is it just a crack in the earth that could reopen again.
How big is the opening at Yellowstone?
I am not a geologist but I wonder if the openings are so big now that the pressure would be lessened than what happened millions of year ago or if it happened again it would spew the ash and magma with the same force.
How big is the opening? I though with volcanoes that the cone builds up and a relatively small opening then blows due to the pressure.
La Garita is extinct. I do not know the answers on the others.
La Garita was 3x the size of the largest Yellowstone eruption.
There’s been a so-called “super eruption” every approximate 650,000 years. The last one was about, ‘gulp’, 650,000 years ago.
about 34 miles by 45 miles, according to WikiPedia.
I don’t think there is an opening, just a swollen area.