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Gurmeet Singh posted an Question

October 05, 2020 • 22:42 pm

30 points

IIT JAM
Geology (GG)

Sir when we see any mica with well defined layering, can we say it is foliated?. then what happen if it get metamorphosed? as its already foliated.

sir when we see any mica with well defined layering, can we say it is foliated. what happen if it get metamorphosed?

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Rahul kumar

Yes, you can say well defined layering in mica as foliation. You should also remember that the foliation is generally used for metamorphic rocks. You can get Foliated mica in lower as well as higher metamorphic grade rocks such as Phyllite, Schist and Gneiss. With increasing metamorphism grade the grain size increase and dark and light minerals get separated from each other (as visible in case of Gneiss). Schist and gneiss, both are types of foliated rocks. With increasing temperature the type of foliation changes i.e. schistose layering becomes gneissose layering.
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Sajan sarthak Best Answer

Mica can be formed from igneous process or Muscovite can form during the regional metamorphism of argillaceous rocks. The heat and pressure of metamorphism transforms clay minerals into tiny grains of mica which enlarge as metamorphism progresses. It usually forms on a continental side of a convergent plate boundary where sedimentary rocks, such as shales and mudstones, have been subjected to compressive forces, heat, and chemical activity. This metamorphic environment is intense enough to convert the clay minerals of the sedimentary rocks into platy metamorphic minerals such as muscovite, biotite, and chlorite. To become schist, a shale must be metamorphosed in steps through slate and then through phyllite. If the schist is metamorphosed further, it might become a granular rock known as gneiss. below figure is a micaschist
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sir MSc k liye kon kon se form bhrne chiye
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Bhu,Sagar, jadhavpur, NIT raipur ,Nit rourkela,And all IITs
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sir kya in sbke form alg alg hain ya all under iit JAM?
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Jam process IIT and NITs take admission. and university have their own exam
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sir which form i should fill.
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each one
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dear gurmeet you have not marked my answer that statistics one
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sagar university and bhu university me admission hona achu bat hogi? as compared to panjab University Chandigarh (as i m in Pu)
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no idea about Punjab university but pondicherry university (PU) is good. Sagar BHU very good in teaching
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i means pu as panjab university.
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