“…East Pacific Rise, Alexander and Macdonald, 1996;Geshi et al, 2007;White et al, 1998). Several hypotheses have been advanced to explain the occurrence of this type of volcanism, such as local stress variations and/or small-scale mantle heterogeneities (Fialko, 2001;Geshi et al, 2007;Harmon et al, 2011;White et al, 1998), but the origin of parasitic volcanoes is still controversial and not really understood. The basic hydrostatic principles behind magma migration, in the case of regular ridge jumps (north-Atlantic, Gaina et al, 2009;Gernigon et al, 2012;Talwani andEldholm, 1977, or Galapagos, e.g.…”