Question

What are the main characteristics of igneous rocks?

Answer 1

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♠ In all, the igneous rocks are roughly hard rocks and water percolates with great difficulty along the joints

♠Igneous rocks are granular or crystalline rocks but there are much variations in the size, form and texture of grains because these properties largely depend upon the rate and place of cooling and solidi­fication of magmas or lavas.

♠Igneous rocks do not have strata like sedi­mentary rocks.

Answer 2

$\small\green{Characteristics\: Of\: igneous\: Rocks}$

• It normally contains no fossils
• rarely reacts with acid
• usually has no layering
• usually made up of two or more minerals
• may be light or dark coloured
• usually made up of mineral crystals of different sizes
• sometimes has openings or glass fibers