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Elena L [17]
2 years ago
8

वायुमण्डलमा कति प्रतिशत नाइट्रोजन उपस्थित छ ?​

Geography
1 answer:
Mumz [18]2 years ago
6 0

Answer:

वायुमण्डल में एक निश्चित मात्रा में पाई जाने वाली गैसों- नाइट्रोजन, ऑक्सीजन तथा कार्बन-डाई-ऑक्साइड की मात्रा क्रमशः 78 प्रतिशत, 21 प्रतिशत और 0.3 प्रतिशत है और शेष असक्रिय गैसें पाई जाती हैं।

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between the South American and African Plates

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Describe the formation, characteristics, and minerals present of the following rocks:
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Explanation:

Serpentine

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  • Characteristics: rich in magnesium and water, light to dark green, greasy-looking and slippery feeling. It can resist the transfer of heat. A source of asbestos, architectural stone, ornamental stone, gem material
  • Minerals present: it follows the formula (X)2-3(Y)2O5(OH)4 where X  can be magnesium, iron, nickel, aluminum, zinc, or manganese; and, Y will be silicon, aluminum, or iron.

Green Schist

  • Formation: they form by regional metamorphism of mafic igneous rocks through depth of burial, and proximity to batholiths.
  • Characteristics: The green is due to abundant green chlorite
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Basalt Pillow

  • Formation: it forms when lava of basaltic compositions erupted underwater. The rapid cooling of the lava forms the pillow-shaped bodies.
  • Characteristics: they are volcanic igneous rocks, very dark, almost black color.
  • Minerals present: Basalt has a lower percentage of silica and a higher percentage of iron and magnesium than other volcanic rocks.

Umber

  • Formation: it develops in Cyprus massive sulfide deposits.
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  • Minerals present: contains iron oxide and manganese oxide and sulfide precipitates like pyrite.

I hope you find this information useful and interesting! Good luck!

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