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Scope Notes: Group of mafic and ultramafic igneous rocks with a broad compositional range, including rocks rich in serpentinite, chlorite, epidote and albite derived from them later by metamorphism. Before 1993, ultramafics was a broader term. As of 1993, this term is restricted to petrologic studies. After 1993, see ophiolite complexes for tectonic studies.
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