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Raunak Mitra posted an Question
January 19, 2022 • 21:26 pm 30 points
  • IIT JAM
  • Geology (GG)

038.a porphyritic igneous rock contains phenocrysts of olivine and calcium-rich plagioclase in an phaneritic groundmass. this is a ? o andesite porphyry )basalt

038.A porphyritic igneous rock contains phenocrysts of olivine and calcium-rich plagioclase in an phaneritic groundmass. This is a ? O andesite porphyry )basalt porphyry O gabbro porphyry O rhyolite porphyry

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  • Anshuman best-answer

    Basalt porphyry. This is because basalt is made essentially of olivine, pyroxene and calcium plagioclase. Therefore, it is the best match.

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