Anukruti Asked a Question
October 17, 2020 7:51 pmpts 30 pts
what kind of zoning is displayed by plagioclase grain? a-normal continuous b-reverse continuous c-normal discontinuous d-reverse discontinuous
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  • Sajan sarthak sahoo Best Answer
    Normal discontinuous zoning: zoning in which the outer portions of the crystal have a lower-temperature composition than the core. Usually reflects progressive change of melt compo...
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  • Rahul pandey thankyou
    The shown zoning is normal dis-continuous zoning because the core is more anorthitic and the rim is less anorthitic. The term discontinuous is used because of Sharpe change in comp...
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