Kevin Christensen, that's all just wishful thinking. Rajah has provided more credible evidence. I am also certain that that BofM peoples would have had a word for volcanoes if they existed in their presence.
I just checked 3 Nephi 8 and there is no mention of a volcano, as the authors of the Interpreter article contend. Also, it is not apparent that the author in the Book of Mormon was witness to the events described in the section, as the authors assert.