What is greenstone rock?
Score: 4.4/5 (66 votes) Greenstone. A field term applied to any compact, dark-green, altered or metamorphosed basic igneous rock (e.g. spilite, basalt, gabbro, diabase) that owes its color to the presence of chlorite, actinolite, or epidote.What is greenstone made up of?Greenstone artifacts may be m...