Crust (geology)

In geology, the crust (scruif wad be mair Scots) is the ootermaist solid shell o a rocky planet or naitural satellite, which is chemically distinct frae the unnerlyin mantle. The crusts o Yird, oor Muin, Mercur, Venus, Maurs, Io, an ither planetary bodies haes been generate lairgely bi igneous processes, an thir crusts is fouthier in incompatible elements nor thair respective mantles.