Subhedral plagioclase is slightly to extensively altered to saussurite and sericite. |
Plagioclase is partly altered to saussurite and sericite, and pyroxene is variably altered to pale brown and pale green actinolitic amphibole, chlorite, and epidote. |
Equally characteristic of the gabbros is the alteration of the felspars to cloudy, semi-opaque masses of saussurite. |