schiste sédimentaire métamorphisé

OBS: Par analogie avec «roche sédimentaire métamorphisée» et «roche métasédimentaire» (voir fiche).

CONT: Placer deposits are commonly found in deeply weathered unglaciated terrane within a stable craton that contains auriferous host rocks. Metamorphic rocks are especially common and include a wide variety of metasedimentary schists and gneisses, as well as volcanic, ultramafic and granitic rocks, Precambrian to Tertiary in age.