write down five salient feature of igneous rock.
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In all, the igneous rocks are roughly hard rocks and water percolates with great difficulty along the joints. Sometimes the rocks become so soft, due to their exposure to environmental conditions for longer duration, that they can be easily dug out by a spade (e.g., basalt).
(2) 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. For example, when the lavas are quickly cooled down and solidified at the surface of the earth, there is no sufficient time for the development of grains/crystals.
(2) 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. For example, when the lavas are quickly cooled down and solidified at the surface of the earth, there is no sufficient time for the development of grains/crystals.
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1 they are hard rocks
2 they have variations in size texture etc
3 they are very less affected by chemical weathering
4 these rocks easily decompose
5 these rocks donot cobtain fossils
2 they have variations in size texture etc
3 they are very less affected by chemical weathering
4 these rocks easily decompose
5 these rocks donot cobtain fossils
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