Figure 3. Schematic cross section of selected seamount settings.

Thickness and depth of basaltic ocean crust (~155 Ma around anomaly M25²²) and bulk thickness and depth of sediments from reflection seismics²³,²⁷. Sediment isochrons (155 to 0 Ma) schematically. To keep it simple, seamount subsidence due to lithosphere loading, magmatic plumbing systems, and interlocking of seamount clastic aprons and sediment sequence are not considered in this sketch. Subaerial and submarine seamount heights are precise, subsedimentary seamount heights are minimum estimates, especially for Tenerife. See text for discussion.