News Earth Pacific volcanoes share split personality Dual chemistry of island chains reflects variations in their deep source Share this:FacebookTwitterPocketRedditPrintEmail By Alexandra Witze September 19, 2011 at 11:07 am This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe