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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
November 25, 2020 • 14:32 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir how b option is wrong any why c correct. please verify
In a Poikilitic texture, the host crystals or oikocryst must have: a.high concentration and should crystallize early to attain a large size b.high concentration but the crystallize carn proceed simultaneously with other constituents of low concentratian c. crystallized after all other constituents but urnder conditions favOuring the formtion of larger crystal.
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Sajan sarthak Best Answer
This is a very good question Poikilitic texture is formed due to different phases of cooling and small crystals gets enclosed inside the bigger phenocrysts. here we call Oikocryst. B and C option almost simillar type so After the small crystal growth and during the small crystal growth if the bigger Oikocryst encloses all them this type of texture is formed ... the most important is the suitable condition must be present to form the bigger crystal.... You will not find such nonsense options in exam.
ok thank you sir. . please reply regularly my questions.