Contact Type

alteration facies contact

definition A metasomatic facies contact separating rocks that have undergone alteration of a particular facies from those that have undergone metasomatism of another facies. Alteration is a kind of metasomatism that does not introduce economically important minerals. more like this
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broader metamorphic contact
narrower alteration facies contact
in scheme contacttype
is primary topic of alteration facies contact