We had ash from Mt St Helens on our vehicles -
In Los Alamos, NM.
Southwest of Los Alamos is the Valles Caldera. I've been told that when it blew, it was taller than Mt Everest.
How they figured THAT out, I'll never know - but the crater is miles across and higher altitude than Los Alamos, which is just over 7000 ft.
Grants has some of the most impressive lava flows, tubes, and even ice caves around.
NM is highly volcanic. I believe most of the west is.
Northern AZ too. Hundreds of cinder comes from Williams to NW of Flagstaff. The ones in Williams are the oldest and the ones near Flagstaff the youngest. Last eruption was about 1000 years ago. Had a friend whose dad was a geophysicist at NAU who mapped out heat flow at Yellowstone as part of his thesis. He told me that if the water table wasn’t so low on the Kaibab Plateau there could very well be geisers in Northern AZ given the amount of heat.
