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Which one of the following definition is correct?

  1. Block mountains: These are originated by tensile forces leading to the formation of rift valleys. They are also called as Horst Mountains.

  2. Dome mountains: These are formed due to the accumulation of volcanic materials. Different types of volcanic cones (e. g. cinder cones, composite cones, basic lava cones, etc.) come under this category

  3. Mountains of Accumulations: These are originated from magmatic intrusions and up warping of the crustal surface. Examples are Normal domes, lava domes, batholithic domes, laccolithic domes, salt domes.


Select the correct answer using the codes given below:
Options:
A .  1 and 3
B .  1 only
C .  1, 2 and 3
D .  2 and 3
Answer: Option B
Answer: (b)
Block mountains:These are originated by tensile forces leading to the formation of rift valleys. They are also called as horst mountains. Dome mountains: These are originated by magmatic intrusions and upwarping of the crustal surface. Examples are: Normal domes, lava domes, batholithic domes, laccolithic domes, salt domes.Mountains of Accumulations:These are formed due to accumulation of volcanic materials. Different types of volcanic cones (e. g. cinder cones, composite cones, basic lava cones, etc.) come under this category.

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