Tag: Bernie Bell

Lower-mantle blobs may reveal relics of event going back to the Hadean

Three-dimensional rendition of seismic tomography results beneath Africa. Mantle with anomalously low S-wave speeds is show in red, orange and yellow. The faint grey overlay represents the extent of surface continental crust today – Horn of Africa at right and Cape Town at the lower margin – the blue areas near the top are oceanic crust on the floor of the Mediterranean Sea. (Image credit: Mingming Li/ASU)