Symboles graphiques à utiliser sur les cartes, les plans et les coupes géologiques détaillés — Partie 4: Représentation des roches métamorphiques

Provides a unified series of symbols and ornaments for the representation of metamorphic rocks. The symbols and ornaments may be divided in two groups as follows: principal types; varia. They are reproduced in two tables which, being derived from a logical system, may be completed easily in case of need.