地殼內上層矽鋁層和下層矽鎂層分界。 Figure patterned after Don L Anderson. New theory oftheearth 2nd. Cambridge University Press. 2007: 102, Figure 8.6. ISBN 0-521-84959-4
(页面存档备份,存于互联网档案馆)). This figure is compatible with SRTM data, unlike an older but still frequently given figureof 6,310米(20,702英尺). Krulwich, Robert. The 'Highest'