HeartwarminSalt

HeartwarminSalt t1_jb4jqv4 wrote

The D” (D double prime) layer, the lowermost zone of the mantle, was describe to me in grad school as the “subducting slab graveyard”. This layer was also hypothesized to insulate the core enough to cause heat anomalies large enough to create break thru hotspots in some places that give rise to features like the Hawaiian or Yellowstone hotspots.

57