Gurmeet Singh posted an Question
November 29, 2020 • 05:00 am 30 points
  • IIT JAM
  • Geology (GG)

Sir why metamorphic rock have more elongation quotient than igneous and sedimentary rocks.

TOundness. us Generally the elongation quotient is maximum in metamorphic rocks, less 9 rocks and very less in sedimentary rocks. Thus when the source rock is of metamo origin, the sphericity of the clastic grains is not that much pronounced. ) Packing It is the manner of aggregation of sedimentary grains, which are held together in

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    Rahul kumar Best Answer

    Metamorphic rocks commonly form under differential stress (unequal stress from different directions) condition. As a result of differential stress, the mineral grains show elongated habit (elongation perpendicular to sigma-1 direction) which in turn lead to high elongation quotient. Whereas in case of igneous rocks, the stress conditions are fairly uniform, giving rise to common equant grains.

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