> > http://www.rdmag.com/news/2013/09/scientists-confirm-existence-largest-sing= le-volcano-earth?et_cid=3D3465578&et_rid=3D54758454&type=3Dcta > -- A reasonable grant from NSF to our national institution on geophysics, and, I think, it could shed some light on the nature of the rise :-) >From William W. Sager, "Tectonic Evolution of Shatsky Rise: A Plateau Formed by a Plume Head or Not?" < http://www.mantleplumes.org/Shatsky.html > (accessed Sep-7,2013) <<<<< Perhaps the most curious observation that does not fit the plume head model well is the remarkable spatial coincidence of Shatsky Rise and other plateaus with spreading ridges at triple junctions. Not only did Shatsky Rise form at a triple junction, but so did the Magellan and Manihiki plateaus. Moreover, other plateaus, whose relationships to ridges are less clear because they formed during the Cretaceous Normal Superchron (Hess Rise and Ontong Java Plateau), are in locations that suggest that they too were formed at triple junctions or spreading ridges. Unless there is some mechanism causes ridges and triple junctions to jump to or migrate rapidly toward plumes (e.g., *Mahoney & Spenser*, 1991), these coincidences imply that the ridges somehow cause the upwelling. >>>>> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .