IIT JAM
Ishita das Asked a Question
November 24, 2020 9:32 pmpts 30 pts
  • IIT JAM
  • Geology (GG)

112. which of the following stalements is/are true for the zoned plagioclase ka sodic core and calcic shell in metamorphic rocks (b) calcic core and sodic shell

112. Which of the following Stalements is/are true for the zoned plagioclase a Sodic core and calcic shell in metamorphic rocks (b) Calcic core and sodic shell in metamorphic rocks c Calcic core and sodic shell in volcanic rocks Sodic core and calcic shell in volcanic rocks (d) sodic core and calcic shell in plagioclase (e) Both 'a' and 'c'
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  • Sajan sarthak thankyou
    In zoned plagioclase Calcic core Sodic rim is the Igneous case in solidsolution. But in metamorphic it's reverse case Sodic core and Calcic rim because due to replacement. so...
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  • Rahul kumar Best Answer
    Answer (e) Both a and c Metamorphic rocks exhibit reverse zoning (sodic core and calcic rim) whereas volcanic rocks exhibit normal zoning (calcic core and sodic rim). It happens b...
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