posted on Apr, 27 2008 @ 05:56 PM
Originally posted by spacedoubt
Now, look at this map of potentially active volcanos in the West.
If you were to fill in the blanks, where would you put the dots to complete the picture?
It's weird, I found myself on the wiki page for Paricutin earlier. IIRC it was a volcano typical of that area with cinder cone activity, though I'm
not too sure about it. Last year Manchester had a swarm of small quakes in August, though none so big. And I'm no volcanologist.
But as for the map of the volcanoes and the arc from west coast to Yellowstone, this shows it a bit better:
Also, bear in mind that the Cascades are fed by the subducting Juan de Fuca plate, and it gets a bit more complicated the further south till you hit
mexico, where it is classic subduction again. But the arc of volcanoes is from a hotspot moving under the crust (or rather the plate moving over the
hotspot, same effect though) with Yellowstone at the end. So that chain ends at Yellowstone presently. Of course another could come up, but I only
know of 2 sets of hotspot volcanoes, Yellowstone and Hawaii, there are probably more, but I don't remember any others.
At least, I'm pretty sure thats the explanation for that chain toward Yellowstone. Remember Earth is a sphere, the plate would move roughly
straight, so it looks curvy, particularly when forced on a flat map.