Question

Give some charactritics of igneous rocks..

Answer 1

Answer:

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Charactristics of Igneous rocks are :-

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1.These are the types of rocks which is formed when hot magma cools.

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2.They are not fossilferrous.

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3.They are generally hard and water percolate in them with great difficulty.

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4.They are in crystalline form.

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5.They are generally whethered by chemical weathering.

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6.Most of the igneous rocks contain silicate.

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7.The valuable minerals like Iron ore, Gold, Silver , zinc, lead, alluminium, maganese , Mica and others are generally found in igneous rocks.

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Answer 2

Answer:

Thesecks are hard,massive and compact.

These rocks are formed by the cooling and hard ening of earth material and size of rocks depends upto the rate of cooling of lava or magma.

Igneous rocks do not have layers.

These rocks are not easily weathered because there are no pores so water cannot easily enter.