What scientists know of our planet is mostly skin deep, giving us just the barest understanding of how geological forces cause the fractured crust to bump and grind against itself.
Just recently, researchers discovered something new about the layer of partially molten rock that sits just beneath Earth's cold outer skin, and it could help us better understand the mechanisms behind the churning flow deep under our feet., and it is generally considered mostly solid, with some liquid material that weakens the overall structure.
"But I think it drives us to see these observations of melt as a marker of what's going on in the Earth, and not necessarily an active contribution to anything." For the new study, Becker and his colleagues created a global map of the asthenosphere by using seismic images of the mantle, collected from stations around the world.
The map of the asthenosphere that scientists have put together does not really align with the movement of tectonic plates above. For example, areas where seismic waves move slower do not show greater tectonic activity.
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