When the crust rebounds, it carries higher - density mantle materials up toward the surface and holds them there. (discovermagazine.com)
The research suggests, for example, that finding pristine mantle material in the middle of the basin might be a bit tricky because of the large volcanic deposit. (spaceref.com)
«The melting we see appears to be driven by subduction — the downwelling of mantle material from the surface.» (sciencedaily.com)