最高8848m,最深-10911m(高差19759m)
continental crust and oceanic curst
依據震波速度之不連續性，可將地球內部分成(由上而下)：地殼(EarthCrust)，地函(Mantle)及地核(Core)三帶。
地殼和地函之間的分界面被稱為「莫霍界面」（Moho discontinuity）
岩石圈(Lithosphere)下之軟層圈為軟流圈(Asthenosphere)屬於上部地函(upper mantle)
The oceanic crust is generally thinner, averaging 5km to 10km thick, while the continental crust mostly 35 to 40 km, but can be as thick as 90km under the Himalayas.
http://www.marc-olivier-mailhot.com/usherb/volcans/03_dispersiondesvolcans.html
