Very interesting. Thanks, ski3pin!
Even more interesting (to me) than the chance it could blow again is that it's so much younger than they thought.
I wonder if now the Park Service is going to have to edit their interpretive handouts that refer to its age...maybe just have some interns do it manually with a Sharpie.
Here is another Maar volcano that is about 25 miles from me. Wonder how old it really is?
http://www.blm.gov/nm/st/en/prog/recreation/las_cruces/kilbourne_hole.html