Instead, Gernon and his colleagues suggest that these volcanoes may be fed by continental rocks of various ages and compositions that peel off into the mantle after cataclysmic continental breakups.

On this day (November 13) in 1915, Leon “Jack” Guthrie was born in Olive, Oklahoma. The cousin of the folk singer Woody Guthrie, Jack carved out a successful recording career. His biggest hit, however ...