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GALERIA
Marmato
SEG Student Chapter Members in Marmato project.
Dacite with a porphyritic texture with visible phenoscrysts of coarse quartz, biotite, less amount of hornblende and abundant content of epidote.
Marmato
Dacite with a porphyritic texture with visible phenoscrysts of coarse quartz, biotite and hornblende, with a clearly halo of propylitic alteration, compound of chlorite and some epidote, covering a veinlet of pyrite.
Marmato
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