Earth’s mantle is cooling faster than expected
Thickness of newly formed mid-ocean ridge crust varies depending on interior heat
COOLING DOWN Newly formed oceanic crust (redder shaded regions) is thinner on average than older crust, new research shows. This thinning suggests that Earth’s mantle is cooling faster than previously thought.
NCEI/NOAA; R.D. Müller et al/Geochem. Geophys. Geosyst. 2008