Greenstone
![](https://geology.ecu.edu/geol1501/wp-content/pv-uploads/sites/351/2020/07/greenstone.gif)
Type | Metamorphic Rock |
Texture | Non-foliated to weakly-foliated; Fine-grained |
Composition | Epidote and Chlorite |
Index Minerals | Epidote and Chlorite |
Color | Green |
Miscellaneous | Harder than glass |
Metamorphic Type | Regional |
Metamorphic Grade | Low Grade (Low P – Low T) |
Parent Rock | Basalt; Mafic igneous rocks |
Metamorphic Environment | Low grade regional metamorphism along a convergent plate boundary |