metamorphic schist containing chlorite and epidote (which are green) and formed by low-temperature, low-pressure metamorphism.
a particular level of metamorphism defined by a particular mineral assemblage and specific pressure and temperature conditions
Light to dark, green, medium- to coarse-grained schist; typically consisting of the green minerals: chlorite, epidote, or actinolite.
A schistose metamorphic rock whose green colour is due to the presence of chlorite, epidote or actinolite.
A schistose metamorphic rock with abundant crystals of chlorite and epidote, giving it a green color.
Greenschist - also known as greenstone is a general field petrologic term applied to metamorphic and/or altered mafic volcanic rock. The green is due to abundant green chlorite, actinolite and epidote minerals that dominate the rock. However, basalts may remain quite black if primary pyroxene does not revert to chlorite or actinolite.
