Talc-schists.
Calcareous schists and marble.
Graphite-schists.
Breccias.
Fluidal breccias, in which broken fragments of solid rock have been included in an intrusive magma.
Breccias proper, formed by fracture and recementing together of fragments without fusion.
Mineral Veins.
Quartz veins (sometimes containing gold and traces of copper).
Calcite veins (with more or less chalybite).
Magnesite veins (in serpentine).