Pegmatite dike cutting schist, MontanaAugust 31, 2017/in Intrusive/by Marli Miller intrusion, intrusive, metamorphic, Archean, precambrian https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png 0 0 Marli Miller https://geologypics.com/wp-content/uploads/2017/04/geologic-time-pics-logo-300x115.png Marli Miller2017-08-31 21:46:222017-10-03 06:05:45Pegmatite dike cutting schist, Montana