I hammered open some ophiolite rock in a inactive quarry here (pondering how litigious or 'unlawfu'l this could be in the US,) found some dark rock with thin cracks filled with white mineralization. They were reminiscent of septarian cracks, but not quite, so I'm assuming some other stress cracks, not from dehydration. Inside were nicely zoned hydrotalcite micro-prisms, and peppered around generously, tinier magnetite octahrdrons on I believe bright white hydromagnesite. Yay tectonics!
maybe.... (My friend Rob Thomas is beginning a video series on Montana Geology, a spin-off from the facebook Montana Geology page and his own work. https://www.facebook.com/groups/200453861048301
I like your "micro tectonics". Nice pyrite too!
I hammered open some ophiolite rock in a inactive quarry here (pondering how litigious or 'unlawfu'l this could be in the US,) found some dark rock with thin cracks filled with white mineralization. They were reminiscent of septarian cracks, but not quite, so I'm assuming some other stress cracks, not from dehydration. Inside were nicely zoned hydrotalcite micro-prisms, and peppered around generously, tinier magnetite octahrdrons on I believe bright white hydromagnesite. Yay tectonics!
That's cool!
Excellent! Maybe make this a zoom presentation for select groups someday?
maybe.... (My friend Rob Thomas is beginning a video series on Montana Geology, a spin-off from the facebook Montana Geology page and his own work. https://www.facebook.com/groups/200453861048301
Nice!!