@MineralCup #calcite and #quartz are better together! Like in this mylonitic quartz veins that contain calcite #porphyroclasts in Neves (South-Tyrol, Italy). Great field trip from @EuroGeosciences Summer School pic.twitter.com/QObm6cCEc0
— Samuele Papeschi (@Sam_Tectonics) October 2, 2019
via Twitter https://twitter.com/Sam_Tectonics
October 02, 2019 at 12:29PM
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