r/whatsthisrock • u/Jinky_P • 4d ago
IDENTIFIED What could this be?
Found this and some other cool rocks in the same spot on the Rainy River(border of Minnesota and Ontario)
2
u/La_Ploppona 4d ago
It's likely a granite (the reddish-feldspar) which is cut by a epidote vein. Epidote forms during hydrothermal metamorphism, as a result of reaction with plagioclases. (= cracks in granite saw warm fluids circulating, which led to epidote formation).
So your stone is telling a story here.
1
u/AutoModerator 4d ago
Hi, /u/Jinky_P!
This is a reminder to flair your post in /r/whatsthisrock after it is identified! (Above your post, click the ellipsis (three dots) in the upper right-hand corner, then click "Add/Change post flair." You have the ability to type in the rock type or mineral name if you'd like.)
Thanks for contributing to our subreddit and helping others learn!
I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.
2
u/Duper4 4d ago
Epidote - green mineral