When last checked this resource was offlineOur automated link checker has alerted the folks responsible for the part of our site where this problematic link is referenced.
If you have further information about the link (e.g. a new location where the information can be found) please let us know.
This animation shows the evolution of thermal structure within the mantle over a period of about 4 transit times (equivalent to ~200 Ma). The scale of thermal structure is controlled by surface plates. Downwelling sheets and upwellings plumes are the predominant structures. Thermal anomalies below spreading centers only extend to a depth of about 200 km.